# What Shower Door Width Should You Buy When Your Opening Measures Differ at the Top, Middle and Bottom? **By Evan Mercer** · 2026-09-24 When a shower opening measures differently at the top, middle, and bottom, the safest starting point is to **use the narrowest measurement** and then compare it to the size ranges listed on the product page. For shower doors, that usually means you should not choose a width based on only the widest point, because the door still has to fit the tightest part of the opening. If you are shopping on KPUY’s [Shower Doors](https://www.kpuyhome.com/collections/shower-door) collection, the exact fit options are shown by size range, not by a single fixed width. Below is a practical fit chart based only on the sizes supplied for the currently listed products. ## How to choose when your opening is uneven ![KPUY Frameless Pivot Shower Door, 1/4" Tempered Glass, Matte Black, Multiple Sizes x 72" H](https://cdn.shopify.com/s/files/1/0792/1873/7473/files/1-2672_c65347c0-4965-4ea9-a6c0-3d8d4f21ce7e.jpg?v=1788233248) ### Pivot Shower Door — Matte Black 7 size ranges Matte Black · Frameless [View Product](https://www.kpuyhome.com/products/frameless-pivot-single-swing-shower-door-72-h) 1. Measure the opening at the **top**, **middle**, and **bottom**. 2. Write down the **smallest** of the three widths. 3. Match that smallest number to a product size range. 4. Verify the product page for any installation notes before ordering. In general, if the opening varies, buyers often prioritize the narrowest point because that is what determines whether the door can physically fit. If the opening is very uneven, you may want to confirm the exact product page or consult your installer before purchasing. ## Width fit chart by product type ![KPUY Frameless Sliding Shower Door, 1/4" Tempered Glass, Matte Black – 76" H](https://cdn.shopify.com/s/files/1/0792/1873/7473/files/1_1881b22a-ea22-40a2-a87b-9a62f3d5a1af.jpg?v=1776059666) ### Sliding Shower Door — Matte Black 7 size ranges Matte Black · Frameless [View Product](https://www.kpuyhome.com/products/frameless-sliding-shower-door-stainless-steel-rail-76h) Measured narrowest opening width Shower door size range shown in the supplied facts Product type / notes from the supplied facts 24"–26" 24" - 26" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 26"–28" 26" - 28" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 28"–30" 28" - 30" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 30"–32" 30" - 32" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 32"–34" 32" - 34" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 34"–36" 34" - 36" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 36"–38" 36" - 38" W x 72" H Frameless Pivot Shower Door, 72" H; available in Matte Black and Brushed Nickel 36"–42" 36"–42" W x 72" H Semi-Frameless Pivot Shower Door, 72" H; available in Matte Black, Brushed Nickel, and Brushed Gold 42"–48" 42"–48" W x 72" H Semi-Frameless Pivot Shower Door, 72" H; available in Matte Black, Brushed Nickel, and Brushed Gold 43"–48" 43" - 48" W x 76" H Frameless Sliding Shower Door, 76" H; available in Matte Black and Brushed Nickel 49"–54" 49" - 54" W x 76" H Sliding Shower Door, 76" H; available in multiple finishes on the supplied facts 55"–60" 55" - 60" W x 76" H Sliding Shower Door, 76" H; available in multiple finishes on the supplied facts 61"–66" 61" - 66" W x 76" H Sliding Shower Door, 76" H; available on several listed products 67"–72" 67" - 72" W x 76" H Frameless Sliding Shower Door, 76" H; available in Matte Black and Brushed Nickel 73"–78" 73" - 78" W x 76" H Frameless Sliding Shower Door, 76" H; available in Matte Black and Brushed Nickel 55"–60" 55-60" W x 60" H Frameless Sliding Bathtub Door, 60" H; Brushed Gold ## What to do if the measurements don’t match perfectly ![KPUY Semi-Frameless Pivot Shower Door, 1/4" Tempered Glass, Matte Black – 36–42" & 42–48" W x 72" H](https://cdn.shopify.com/s/files/1/0792/1873/7473/files/1_dcd1be44-f068-435b-8eee-0552d7836c11.jpg?v=1782121749) ### Pivot Shower Door — Matte Black 2 size ranges Matte Black · Semi-Frameless [View Product](https://www.kpuyhome.com/products/semi-frameless-pivot-shower-door-series) If your top, middle, and bottom measurements land in different ranges, the best choice is usually the size range that covers your **narrowest usable opening**. However, because shower doors can depend on the exact installation style, you should verify the product page before ordering if your opening is close to a range boundary. - If the opening falls clearly inside one range, that range is usually the easiest starting point. - If the opening is near the edge of two ranges, check the product page carefully. - If the opening is highly irregular, confirm with your installer before buying. ## Products in the supplied facts that may help narrow your choice The supplied product facts include several active shower door options, such as frameless pivot doors, semi-frameless pivot doors, frameless sliding shower doors, double sliding shower doors, and a frameless sliding bathtub door. The exact available finishes and sizes vary by product, so it is worth comparing the collection page and each product page before checkout. Product type Heights shown in the supplied facts Example size ranges shown Pivot Shower Doors 72" H 24" - 26" W x 72" H through 36" - 38" W x 72" H; also 36"–42" and 42"–48" options on semi-frameless models Sliding Shower Doors 76" H 43" - 48" W x 76" H through 73" - 78" W x 76" H, depending on the product Double Sliding Glass Shower Door 76" H 43-48" W x 76" H through 61" - 66" W x 76" H Frameless Sliding Bathtub Door 60" H 55-60" W x 60" H ## Bottom line If your shower opening measures differently at the top, middle, and bottom, start with the **narrowest width** and then choose the size range that includes that measurement. For the exact fit and any installation-specific limitations, always check the product page before you buy. To compare current options, visit the KPUY [Shower Doors](https://www.kpuyhome.com/collections/shower-door) collection and confirm the exact size range, finish, and availability on the individual product page. --- > Source: [KPUY](https://www.kpuyhome.com/blogs/expert-advice/what-shower-door-width-should-you-buy-when-your-opening-measures-differ-at-the-top-middle-and-bottom)