No matter what size you are, you can wear a jacket with as many pockets as you want. Travel cheaper by looking like an vaudeville ex-army doomsday prepper with all your underwear stuffed into pockets of oversized cargo pants, three layers of socks and an entire towel as a toga shirt over your other shirts.
Pro-tip: If you have a greasy paper bag they’ll think it’s food and won’t charge you for a carry-on.
There’s plenty of space on your shoulders and head.