Hi Wyldflower, i think your chinks look fine espically for your first time. When i make a pair for a customer i have a base pattern made out of poster board and hold that around their leg to see how they fit. Then you can mark it and and cut or add on. If you cut to much off tape the piece you cut off back on and go again.
Plus save all of your patterns. They may fit the next customer at worst you can see how much you need to add or take off for them to fit. Poster board is your friend and a lot cheaper than leather.
John