Kah&Kee Faux-Leather Backpack Diaper Bag with Laptop Compartment Travel School for Women Man https://www.amazon.com/dp/B07CYYQJN2/ref=cm_sw_r_cp_api_glt_fabc_SQ9JPZBX8D4WMRSVKGT3?psc=1

$45 username suggests black and I’d recommend large. This would give you a start. I have a couple and they wear well.