Nice job! I've made a lot of rag quilts in the past. I start with a 10" block, and a 8" batting. So by the time I sew the rows together, it is 7 x 9 blocks (56x72). Larger blocks than what you've done here.
There are 'rag quilt snips' available. They really do make a difference. I leave my quilt on my ironing board and I make a rule, cut 1/2 of a block every time I pass it. Cant believe how many times I pass by within one afternoon. Usually will take me a day or two to finish.