I use 2.5 sqs for lots of different projects!! My avitar is made of 2.5 sqs. I love them..sew 4 together for 4 patch..makes 4.5 sq. - nine together.. 9 patch.. so many different designs to sew them into. sew into strips = borders etc. sort per darks /lights ..neutrals..color families. you can make wonderful projects.. Ranchwife has a lovely example. I make doll quilts...potholders.. pincushions..bags.. big quilts.. just have fun..lots of ideas on different blogs.. love this QB