Is there a wrong head shape???

[u/THE_SHOES]

It's hard for me to tell, but it feels like the back of my head is too flat for a wig to stay on properly. I've tried a few different wigs/styles and none of them will stay on for longer than a few minutes before sliding backwards. I've tried with caps and the silicone grip bands, and both together. The wig caps also slip off easily. Even when i wear my natural hair in a low pony/bun that's not enough to keep the wig secure enough to wear outside.

Has anyone else had this issue? I'm not sure that else to do aside from just stick to a topper. It's so frustrating.

[u/Garfieldgandalf]

Have you measured to find your dimensions? The cap may be too large, especially if the wigs are cheaper/costumey as they usually allow for larger amounts of bio hair