Selling for the first time, advice about shipping certain items

Hey guys, so I have a bunch of clothing and accessories I want to try to sell on depop but I'm curious how other sellers ship certain items. How do you guys ship shoes and/or bags? And how do you add it to your shipping cost? Shoes are trickier depending on what they are I've noticed so do you usually do it by weight or choose a flat rate type of shipping? Thanks for the help!