These are 8 inch blocks... the centers are cut as 4-1/2 squares (4 inch sewn) then the border fabrics are 2-1/2 inch strips. If you go to www.blockcentral.com and look in the block swaps, you'll find instructions and sizes for making the happy block... PLUS theres always a swap going on. We love to have more quilters joining us. Two winners a month!