A full 41-inch loop band set spanning light to heavy resistance — the format serious Reddit users recommend for anyone wanting to do real strength work, not just mobility.
If you want to actually train with bands — assisted pull-ups, deadlifts, rows — you need 41-inch loop bands, and Tomshoo's 5-piece set is the accessible entry point the community points to.
“I recommend a set of 41" loop bands, going at least from yellow 1/4" to green 1.75". An example would be the Tomshoo 5 band set offered on Amazon.”