Brite-Mat® square coaster with tyre material branded from £0.36 at Mugstore
Square Coaster SVG Coasters Stencil DXF Circle Wall Decor - Etsy UK
Square Faux Leather Coaster – Print on Demand Coasters UK – PrintDrop
MDF Sublimation Square Coaster with Cork
Cuero Square Coaster in Orange by The Conran Shop, at The Conran Shop
Blank Square Coaster For Cross Stitch 80mm | Best Seller
Cup o' kindness Square Coaster | LCR46 - LT Creations
4.5 Inch Premium Black Iron Metal Coaster Holder for Both Round and Square Coasters New Modern Design. Stronger, Thicker Construction Holds Up to 7 Coasters (1) : Amazon.co.uk: Home & Kitchen
Unisub Square Hardboard Coaster 9cm x 9cm | Xpres Craft