Shower Seal Fit

Find the right shower door seal by glass thickness and gap.

Two measurements decide whether a replacement seal fits: how thick your glass is, and how big the gap the seal must close. Enter them below — the finder scores our reviewed catalog of sweeps, drip rails, side seals, magnetic pairs and jambs, and explains every match.

I don't know my glass thickness

Open the door and look at the exposed edge — that face's width is the thickness. Then:

  • Best: a caliper on the bare edge. 6.35 mm = 1/4″, 7.9 mm = 5/16″, 9.5 mm = 3/8″, 12.7 mm = 1/2″.
  • Tape measure: hold it flat across the edge, eyes level with the glass. Distinguishing 3/8″ from 1/2″ needs a straight-on view.
  • Paper trace: press a card against each face and mark both sides on paper, then measure between the marks.
  • Rules of thumb: framed sliding doors are usually 3/16″–1/4″; semi-frameless 1/4″–5/16″; frameless hinged 3/8″; heavy premium frameless 1/2″.

Full walkthrough: How to measure shower door glass thickness.

How this site works

  1. Measure two numbers. Glass thickness at the bare edge, and the gap (bottom, side, or door-to-wall) with the door closed. The measuring guides take five minutes.
  2. Get scored matches. Every product in the catalog carries manufacturer size ranges with a review date. Your inputs are checked against those ranges — 100 for an exact fit, 80 when trimming is expected, 60 near the edge of a range, 30 for risky combinations.
  3. Verify on the live listing. We show no prices or stock — both change too fast to republish honestly. Cards link straight to Amazon with a plain "Check price" button so you confirm size and price at the source.

As an Amazon Associate, we may earn from qualifying purchases. How this site is funded.

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