Typical ready-made frame dimensions
Frame Size Mat Opening Image Size
8" x 10" 4.5" x 6.5" 5" x 7"
11" x 14" 7.5" x 9.5" 8" x 10"
16" x 20" 10.5" x 13.5" 11" x 14"
20" x 24" 15.5" x 19.5" 16" x 20"
24" x 36" 19.5" x 29.5" 20" x 30"
30" x 40" 21.5" x 31.5" 22" x 32"
Measure it - your frame may not be typical, let us know what the “x” and “y” dimensions are