I would make it the regular size and gift it to someone! It is a lovely bag, and makes a great gift. I made about 6 of these (I love to do production line sewing) and gave almost all of them away. My friend made them and sold them for $125 each! Very time consuming to get all the pieces cut, I started without labeling, BIG mistake! This is a wonderfully written pattern, great finished product. I think it is large as it is, but if you want it larger it sounds like you have thought it through. Are you changing the size of the front pocket so the straps will be further apart? Inside zipper pockets can be eliminated as they do inhibit how wide the bag will stretch sideways. Good luck!