Polymarket: What's the common approach to sizing bets relative to conviction?

Hey everyone, still pretty new to the Polymarket scene and trying to get my head around bet sizing. I understand the basic idea of putting more capital behind higher conviction calls, but how do you guys actually quantify that? Are you using a fixed percentage of your total 'play money' on each market, or does it vary wildly? I'm finding myself sometimes overcommitting on what I think is a sure thing, only for it to flip. Just curious how the more experienced folks here manage their risk relative to their perceived edge on a market, especially when the odds are swinging leading up to resolution.