Museum Series Double Mat - 20" x 28"

Intended for frames with an inside dimension of 20 x 28 inches

Choose Your Image Size
Select your desired image window size from the menu. This size should match the dimensions of your image or artwork.

Important: The mat’s window opening will be ½ inch smaller than the size you select. This ensures proper overlap to hold your image in place.
Example: If you select an 8x10" image size, the actual opening will be 7.5x9.5".

Double Mat 
When selecting a double mat, the top mat will reveal ¼ inch of the bottom mat around the window opening, adding depth and a layered look.

About Our Museum Series Mats
Our Museum Series is made from 100% cotton, naturally acid-free and free from optical brighteners or harmful additives.  Each mat is buffered for long-term preservation and features a crisp 45° bevel for a clean, professional look. Ideal for galleries and high-value art, these mats offer top-tier archival protection with timeless elegance.

Includes Free Backing Board
Every pre-cut mat from Gallery Mats includes a backing board that matches the quality of the series you've selected—at no additional cost. It provides sturdy support and makes mounting and displaying your artwork or photo effortless, right out of the box.