The mats are stepped to create a shadowbox look allowing room for the vinyl LP to be placed. The reproduction album Sleeve art is full size 12" by 12" also included is an engraved plate "Legends Of Music" and a gold foil label. The glass used is known as museum glass which is a framers grade UV protected clear acrylic which is unbreakable. This item is in the category "Entertainment Memorabilia\Music Memorabilia\Rock & Pop\Artists G\Grateful Dead\Other Grateful Dead Mem". The seller is "rockitoutrecords" and is located in this country: US.This item can be shipped worldwide.