I've been using these belts from Amazon for 2 years or so now. They are elastic, so they are snug when standing but won't dig in when sitting. They're also wide, so they don't roll near as much.

https://www.amazon.com/dp/B07D352JTC/ref=cm_sw_r_cp_apa_glc_fabc_9Z7GNQ4WNH5XG103XVDC