Nope, just following tutorials. The red and green are Japanese (stab) bound. The size didn't seem to be a problem. It's a Yotsume Toji stitch. I don't know anything about it, it's just what came up on Google. They don't actually have spines, the covers are just cloth glued to the first and last pages.Have you bound before?
Western bound, pages stitched together instead of glued, because that seemed like it would last longer. I don't know if the stitching has a name. A signature is four pages folded together. Each signature is stitched together thru the middle, bottom, top, and tied in the middle. Then all the signatures are tied together, thru the middle of one, out the middle of the other, thru the bottom of it, out the bottom of the next, et cetera. Then the board glued to the fabric, end pages glued to the cover.And what about this one?
Okay, yeah, I known that stitch, but I too don't know a name for it. It looks like you got it pretty nice and tight. If you haven't yet, I'd suggest getting a bone folder, because they're pretty wonderful and make the signatures a bunch easier. Hope to see more from you in the future, these look pretty sweet.