LORA weight: -4 to 4+
0 to 3+ for IXLv2
This is a slider, Lora, so you can choose whatever weight you want, so experiment and find what suits you best. A positive weight adds size to thighs. You can use even higher weights such as 8 and above it all depends on characters and checkpoints.
You can also add thick thighs to your prompt to make it have an even stronger effect.