Howdy & welcome from Texas. I've made several kits & yes, the numbers in parentheses do indicate what size quilt you are making. Looks like the instructions are for 3 different quilt sizes. Keep asking questions. This board if full of very helpful & experienced quilters. Someone/or many will have an answer for you. I would love to see the quilt when you are finished. Try to learn how to post pictures so we can see your finished quilt.