Inside zipper closure
S, M, L, XL.
Funtasma Costume Boots by Pleaser - See size chart for conversion. They are men's costume sizes with a range of approximately 1-2 sizes and are designed to be a general fit for that size range.
USA sizes and in most cases this means they are 1 size smaller than AUS sizes. Check the measurement chart and check the length of your foot to compare the size.