I don’t have flats but 3 pairs of pumps and the oldest pair has a similar mark from what I assume is being caused by the pinky toe. It doesn’t bother me though when I wear them.
Thanks for checking yours. I can’t seem to find this issue on the Wear & Tear thread so I asked if this is a common issue on the insole of Rockstuds. Mine was worn rarely but this happened already. I may have sharp nails! LOL!
Hahaha...I didn’t notice it on my other 2 rockstuds so I’m thinking it was caused from a day when my nails needed to be cut or something. Who knows...is it uncomfortable?