Finding the best 39 to 40 inch shower door starts with your finished opening measurement—not just the size in a product name. The options below include adjustable pivot doors, a heavier-glass hinged model, and a swing screen designed for a wider opening. Compare each door’s fit range, height, opening style, and installation needs before choosing.
Table of Contents
Quick Comparison
| Shower Door | Fit or Model Size | Height | Glass and Style | Best For |
|---|---|---|---|---|
| AROJAY Semi-Frameless Pivot Door | 38–42 in. opening | 73 in. in title; description specifies a 72 in. opening | 1/4 in. tempered glass; pivot | Adjustable fit and magnetic closure |
| Lindavell Semi-Frameless Pivot Door | 38–42 in. opening | 71 in. | 1/4 in. tempered glass; pivot | A wide adjustable entry |
| DreamLine Unidoor Hinged Door | 39–40 in. wide | 72 in. | 3/8 in. tempered glass; hinged | A substantial frameless look |
| DreamLine Aqua-Q Swing Screen | 39 1/2 in. model size | 72 in. | 1/4 in. tempered glass; swing screen | A more open design for a 60 in. opening |
| SUNNY SHOWER Double-Swing Pivot Door | 38.5–40 in. opening | 75 in. | 1/4 in. tempered glass; double swing | Two-way entry and a taller door |
Our Picks: Best 39 To 40 Inch Shower Door reviews
1. AROJAY Semi-Frameless Pivot Door: Best for Adjustable Fit
This AROJAY door is designed for openings from 38 to 42 inches wide, making it a flexible option if your measured opening is close to 39 or 40 inches. Its telescopic top rail adjusts by up to 4 inches, and the wall profiles provide additional adjustment for minor wall irregularities. The listed product title gives a 73-inch height, while the description says it is designed for a 72-inch-high opening. Check the manufacturer’s current fit details before ordering to resolve that difference.
The semi-frameless design uses 1/4-inch SGCC tempered glass, an aluminum frame, stainless steel hinges, and a chrome finish. A full-length magnetic seal and bottom waterproof strip are intended to help contain splashes. The door is reversible for left- or right-hand installation, and the listed walk-in opening is 20.3 inches.
Its adjustable width is useful when a fixed-size door would be a close fit, but the stated opening is still the key measurement. The entry is narrower than the listed openings on some other options, and the height information needs confirmation. This is a practical choice if you want a conventional pivot door with a magnetic closure and can verify the height for your shower.
Pros:
- Fits a broad 38–42 inch width range.
- Reversible for left- or right-hand installation.
- Includes a magnetic seal and bottom waterproof strip.
- Uses 1/4-inch SGCC tempered glass.
Cons:
- The title and description give different height details.
- The listed walk-in opening is 20.3 inches.
Verdict: Consider the AROJAY if width flexibility and a magnetic closure matter most, but confirm the required height before buying.
2. Lindavell Semi-Frameless Pivot Door: Best for a Wide Entry
The Lindavell is another adjustable pivot door for 38–42 inch-wide openings, with a listed height of 71 inches. Its telescopic rail offers up to 4 inches of adjustment without cutting, and the wall profiles allow extra adjustment for walls that are not perfectly vertical. The stated walk-in opening ranges from about 20 1/8 to 24 1/8 inches, depending on the installed width.
It has 1/4-inch SGCC and ANSI-certified clear tempered glass, an easy-clean coating, and a brushed-finish aluminum frame with stainless steel pivot hardware and handles. The listing also describes a magnetic silent-close design and waterproof sealing strips. Reversible installation lets you choose a left- or right-opening setup.
Compared with the AROJAY, this model has a shorter listed height but a potentially wider entry. Its 71-inch height may be a limitation if your shower needs a taller door, so measure from the intended mounting surface rather than relying on the product’s width range alone. The no-cut rail and installation guidance may appeal to homeowners who want a more adaptable setup, though door installation still requires careful alignment and sealing.
Pros:
- Adjusts to fit openings from 38 to 42 inches.
- Offers a listed walk-in opening up to 24 1/8 inches.
- Includes an easy-clean coating and magnetic closure.
- Can be installed for left- or right-hand opening.
Cons:
- The 71-inch height may not suit taller shower openings.
- Its brushed finish may not match every bathroom’s hardware.
Verdict: Choose the Lindavell if its 71-inch height works for your space and you want an adjustable pivot door with a potentially roomy entry.
3. DreamLine Unidoor: Best for a Heavy-Glass Frameless Look
The DreamLine Unidoor is sized for a 39–40 inch-wide opening and stands 72 inches high. Its 3/8-inch certified tempered glass is thicker than the 1/4-inch glass used by the other doors in this group. The frameless hinged design and satin-black hardware create a more defined, modern look than a semi-frameless framed door.
An anodized aluminum wall profile allows up to 1 inch of adjustment for width or out-of-plumb walls. The glass has DreamLine’s ClearMax water- and stain-resistant coating. The manufacturer recommends professional installation, an important point to consider for a heavier-glass door that needs precise mounting. A limited lifetime manufacturer warranty is listed, along with a three-year warranty for hardware finishes.
Unlike the wider-range pivot models, this door is intended for a narrower 39–40 inch size window, so it is not the most flexible option if your opening falls outside that range. The thicker glass and frameless appearance are its main distinctions, but they also make accurate measurement and installation especially important. It is a strong fit for shoppers prioritizing glass thickness and a clean hinged-door design.
Pros:
- Uses 3/8-inch certified tempered glass.
- Includes ClearMax water- and stain-resistant glass coating.
- Wall profile allows up to 1 inch of adjustment.
- Has a frameless design with satin-black hardware.
Cons:
- The specified fit range is narrower than the 38–42 inch models.
- Professional installation is recommended.
Verdict: The Unidoor is the best match here if you have a 39–40 inch opening and prefer thicker glass, a frameless look, and professional installation.
4. DreamLine Aqua-Q Swing: Best for an Open, Screen-Like Design
The Aqua-Q Swing has a listed model size of 39 1/2 inches wide by 72 inches high, but it is not a conventional door intended to close off a 39–40 inch shower opening. It is described as a single-panel swing screen for a 60-inch opening, with a listed walk-in opening of 57 inches. That makes it a distinct option for a more open shower layout rather than a direct substitute for a full-width enclosure door.
The screen uses 1/4-inch certified clear tempered glass and brushed-nickel hardware. Its continuous, self-centering pivot can rotate into or out of the shower, and the reversible glass allows left- or right-side installation. The wall profile accommodates up to 3/8 inch for out-of-plumb walls. A towel bar handle adds a practical touch, but the open layout means water containment may differ from that of a fully enclosed door.
Measure the entire shower configuration before considering this model: the 39 1/2-inch product size and 57-inch walk-in opening describe a screen used within a wider opening. The manufacturer recommends professional installation. If you need a door that closes across a roughly 40-inch opening, one of the pivot or hinged doors above is a more direct match.
Pros:
- Reversible for right- or left-side installation.
- Swings both into and out of the shower.
- Has a self-centering pivot and towel bar handle.
- Wall profile allows adjustment for uneven walls.
Cons:
- Designed for a 60-inch opening, not a standalone 39–40 inch enclosure.
- The open screen design may not contain water like a full door.
Verdict: Pick the Aqua-Q only if you want a swing screen for a 60-inch shower opening; it is not the right choice for closing a 39–40 inch opening by itself.
5. SUNNY SHOWER Double-Swing Door: Best for Two-Way Entry
This 40-inch-wide, 75-inch-high SUNNY SHOWER door adjusts from 38.5 to 40 inches, with up to 0.75 inch of adjustment per side. It uses two doors that can rotate inward or outward, offering more entry flexibility than a single-swing design. The listing notes that one door should be pulled out before the other to achieve the double-opening motion.
The door uses 1/4-inch ANSI Z97.1-certified tempered clear glass. A magnetic adhesive strip between the doors is intended to reduce noise and help limit water leakage. The pivot can be raised or lowered slightly to help avoid rubbing against the floor. Its 75-inch height is taller than the other options in this comparison, so check that it clears your ceiling, showerhead, and any other fixtures.
The narrower adjustment range makes this a less flexible choice than the 38–42 inch models, but it may be a good match if your measured opening is between 38.5 and 40 inches. The two-door arrangement can make entry easier, though it requires a little attention to the opening sequence. Confirm that the available swing space will not interfere with nearby fixtures or bathroom items.
Pros:
- Two doors swing inward or outward.
- Adjusts to fit openings from 38.5 to 40 inches.
- At 75 inches high, it is taller than the other options listed.
- Includes a magnetic strip intended to help reduce noise and leaks.
Cons:
- Its width adjustment range is narrower than 38–42 inch models.
- The two doors have a specific opening sequence for double opening.
Verdict: Choose the SUNNY SHOWER if your opening falls within its stated range and you want a taller door with inward- and outward-swinging panels.
How to Choose a 39 to 40 Inch Shower Door
Measure the Finished Opening
Measure the width where the door will be installed, not the rough opening behind unfinished walls. Check the width near the top, middle, and bottom because walls may not be perfectly parallel. Compare your measurements with the product’s stated fit range and adjustment method. A door listed as 40 inches wide may not fit every opening near that size.
Check the Door Height and Bathroom Clearance
Compare the listed door height with the available wall height and the position of shower fixtures. These choices range from 71 to 75 inches, and the AROJAY listing has differing height details between its title and description. Confirm the exact required opening height with the seller or manufacturer before ordering.
Choose the Right Opening Style
A pivot or hinged door swings from one side, while the SUNNY SHOWER’s two panels swing inward or outward. Make sure the door has enough clearance to move without hitting a toilet, vanity, towel bar, or other fixture. The Aqua-Q is a single-panel screen for a 60-inch opening, so it should not be treated as a standard door for a 39–40 inch opening.
Consider Glass Thickness and Safety Information
The products listed use tempered glass, with thicknesses of either 1/4 inch or 3/8 inch. The Unidoor is the thickest-glass option in this group. Check the product specifications and glass certification details, and handle all glass carefully during transport and installation.
Account for Uneven Walls
Some doors include adjustable wall profiles to help accommodate walls that are not perfectly vertical. The amount varies by model, so do not assume one door’s adjustment range applies to another. Measure the wall and opening carefully, and follow the manufacturer’s installation instructions for leveling and sealing.
Match the Finish and Hardware
Choose a finish that works with your shower fixtures and other bathroom hardware. These options include chrome, brushed finishes, satin black, and brushed nickel. Also consider whether you want a framed or semi-frameless look, a towel bar, or a simpler handle design.
Plan for Installation and Water Containment
Shower doors need secure mounting and careful sealing to work as intended. The Unidoor and Aqua-Q listings recommend professional installation, and professional help may also be useful if you are unsure about drilling into tile or aligning the door. Magnetic seals and waterproof strips can help limit splashes, but the installation and shower layout also affect how well water stays inside.
Frequently Asked Questions
What size shower opening fits a 39 to 40 inch shower door?
It depends on the model. Some doors fit a range such as 38–42 inches, while others have narrower limits such as 38.5–40 inches. Use the manufacturer’s stated fit range and your finished opening measurements rather than relying only on the product name.
Which option fits the widest range of openings?
The AROJAY and Lindavell models are both listed for openings from 38 to 42 inches. The AROJAY height information differs between its title and description, so confirm that detail before choosing it.
Which door has the thickest glass?
The DreamLine Unidoor uses 3/8-inch tempered glass. The other products in this comparison list 1/4-inch tempered glass.
Can these shower doors be installed to open from either side?
The AROJAY, Lindavell, and DreamLine Aqua-Q listings describe reversible installation. Check the instructions for the specific model to confirm the intended orientation and installation steps.
Is the DreamLine Aqua-Q a standard 40-inch shower door?
Not in the usual sense. Its listed model size is 39 1/2 inches, but it is a swing screen intended for a 60-inch opening and has a listed walk-in opening of 57 inches. It is not a direct replacement for a door that closes across a 39–40 inch opening.
Should I hire a professional to install a shower door?
Some models specifically recommend professional installation. If you are not comfortable measuring, drilling into tile, handling glass, or aligning hinges, hiring an installer can help avoid fit and sealing problems.
Final Recommendation
For a typical 39–40 inch shower opening, the DreamLine Unidoor stands out for its 3/8-inch glass and frameless design, provided its specified fit range suits your measurements and you are prepared for professional installation. If you need more width flexibility, compare the AROJAY and Lindavell, while confirming their height requirements. The SUNNY SHOWER suits shoppers who want a taller double-swing door, and the Aqua-Q is best reserved for its specified 60-inch screen layout.
