4x4 Coaster Set & Box Beechwood Coaster Storage Box Wholesale Wooden Gifts UKHipFlask Wooden Coaster Box with 6 Coasters square Kurgan Kenani Leather 4imprint.ca: 4 Coaster Set C147458 Round 4x4 Slate Coaster 6 Piece Set. Magnetic acrylic coaster set of 4 and holding case for your needlepoint. Both the circle and square have 4. 25" inside dimensions (made to accommodate finishing + cording of your standard 4" circle or 4" square needlepoint canvas). The coasters have a small lip on the top to keep your drink from sliding off. Your needlepoint is fully protected and interchangeable with our magnetic closure from the top of the coaster to the base. Each set comes with four coaster acrylic pieces and an open storage box to keep them in. We recommend sending one piece of the acrylic set off to your finisher to ensure the perfect fit for your piece.