A: Your costume might not support auto-fitting.
Auto-fitting only works for costumes where the Hips bone is registered within HumanoidMapComponent as HumanoidBones.
In the XWear Packager's XWear automatic setup, bones with assigned weights are set as HumanoidBones in the HumanoidMapComponent.
For items like gloves or shoes that lack a Hips bone or don’t have weights assigned to them, the Hips bone won’t be automatically configured as HumanoidBones.
Why doesn’t auto-fitting work for costumes without a Hips bone?
This is to preserve the original costume design as much as possible while scaling it.
To prevent unintended size changes, auto-fitting is disabled
if the Hips bone is not present in the HumanoidBones.
If your costume includes a Hips bone, you can manually register within HumanoidMapComponent as HumanoidBones. Once registered, auto-fitting will work even for items like gloves or shoes.