SubliSLATE™ Coaster, 3.5" Square, White Matte. Smooth, machined sublimatable slate, each with unique fractured edges. Excellent bundle item with matching slate plaques. Requires 1/8" green pad for pressing, sold separately. Slate can vary in size by up to -0.4". (See SUSL047 for round coaster.) An interesting alternative use for these coasters is to add a small easel (U4219 or U4220, sold separately) and make a mini plaque!