For a snug fit, send in all the measurements you can get! Preferrably, go to a tailor and tell him you want to be measured for a leather jacket you want to fit snuggly and then talk to Peter on his advice.
Other than that, there is an almost endless stream of options for you to decide on. Do a search to find out more about them, though some of those you'll find are these:
Elastics between action pleats -Helps keeping the pleats closed.
Hidden press studs -One upper and one lower, LC-style but could be added to all jackets.
Gussetts -Single by default if you add them, but could be done double for further movability.
X-box pattern sidestraps -Box is standard, X-box is a sturdier config.
(D-rings is standard, I think, but other options are present.)
Extra inside pocket -Could be made "grail size" and/or with a zipper added.
Cotton body, satin sleeves -Recommended config.
These are just some options off the top of my head. Good luck, and tell us what you end up deciding for.
Welcome!
Regards,
Swindiana