With being very knew to the craft all the experience I have with thread size is just buying what they have at hobby lobby, which is just a certain sized waxed thread (atleast what I have found.) Maybe I should just slow down a little and do some more hand sewing. I just loved making the belt that I did, I just didn't like the amount of time it took to hand sew. The wallets, sheaths and other smaller stuff I didn't mind at all hand sewing. I did read some the stickied thread and learned alot.