Archies Thongs are a one-piece design and the toe pole / post is quite thin and is made from a really soft foam. As such, it hardly ever causes irritation. If you find it too thick, you can try gently stretching it with your hands so that it feels comfier.
Most of the straps and toe poles of typical thongs are made from hard plastic which commonly causes irritation and blisters.
While we cannot guarantee it will be the case for you, we get an enormous amount of people that normally cannot wear thongs due to that reason, wear Archies Thongs without any irritation whatsoever.
Useful article: How to stretch the strap on Archies Thongs