Shop › Scientific Halloween 4pc Fabric Coaster Set Image 1 of 2 Image 2 of 2 Scientific Halloween 4pc Fabric Coaster Set $10.00 sold out Handmade scientific Halloween 4pc fabric coaster set. One of a kind and 100% cotton. Approx 4”x4” Sold Out Added! Handmade scientific Halloween 4pc fabric coaster set. One of a kind and 100% cotton. Approx 4”x4”