I agree with Sadiemae...I prefer the 8 1/2 x 24 particularly when cutting borders. Alot of times you want/need a 6 in. finished piece which is 6 1/2 in. cut. But I would also recommend a smaller 6 in. x 10 in. for those smaller cutting requirements. But make sure both are of the same manufacturer and both contain at least 45 and 60 degree markings. Those will keep you going for ages.