10 BLOCKS SCULPEY iii 3 111 Oven Bake Polymer Clay (570g) Choose 10 blocks from the full colour range of gorgeous shades available below. Each block weighs 56g and measures 60mm x 45mm x 20mm. Polymer clays bake hard and strong and can be used for all manner of craft projects and form the basis for many craft businesses. More information in Full description.