Guardhouse Single Row Crown - Red Box - 4.25 x 2.63 x 2.55 Guardhouse single row crown box measures approximately 4.25 x 2.63 x 2.55 and holds crown size coins in paper holders. It can also be used to hold certified coins or coin slabs. Manufactured with a high quality textured exterior the Guardhouse box features re-enforced filaments, which give the box added strength and durability.