THIS IS FOR ONE SINGLE MAT without backing and bags , Featuring a picture opening for a 12x18 inch photo, to fit in a 18x24 inch picture frame. Photo
18x24 Mat for 12x18 Photo - Precut White on Black Double Mat Picture Matboard for Frames Measuring 18 x 24 Inches - Bevel Cut Matte to Display Art
White Picture Frame Mat Set Mat With White Core and Clear Bag
Soft Pink Picture Frame Mat With White Core Available in Multiple
Double Mats : 18X24 For 11X17 Artwork
SINGLE MATS Custom Pre Cut Non-Standard Art & Frame Sizes
Golden State Art,11x14 Pre-cut Double Mat with Whitecore fits 8x10
18x24 Pre-cut Mat with Whitecore fits 13x19 Picture + Foam Board +
18x24 Mat for 13x19 Photo - Precut Black with Black
24x36 Mat for 20x30 Photo - Precut White on Black Philippines