Strictly Briks?? items are compatible with all major brands?? including LEGO???? Mega Bloks???? & K'NEX?? brand sets. Strictly Briks?? is not affiliated with or endorsed by these brands. LEGO?? is a trademark of the LEGO Group of Companies?? which does not sponsor?? authorize?? or endorse Strictly Briks?? toys.</br>These base plates are the perfect size to create anything from a house with a great yard to a huge sprawling castle with towers and spires. It has never been easier to let your imagination run wild with the fun of creating something uniquely yours.</br>Create with your existing sets on our affordable base plate solution. Use this base plate set to maximize play space.</br>This base plate set contains twelve 10"including 4 triangles?? 4 half circles?? and 4 squar