Structural Industries

Mats

Mats are included with all standard size wall frames in sizes 5x7-16x20, except 8-1/2x11 and 10x13.

 Frame Size

 Mat Opening Size

 5x7

 3x4-1/2

 8x10

 4-1/2x6-1/2

 9x12

 5-1/2x7-1/2

 11x14

 7-1/2x9-1/2

 12x16

 7-1/2x11-1/2

 14x18

 10-1/2x13-1/2

 16x20

 10-1/2x13-1/2