The size options are Australian Blundstone sizes. These are identical to men's UK sizes.
HALF SIZES:
BLUNDSTONE:
Half sizes in Blundstones provide extra width not length (so a 9.5 is the same length as a 9 just a bit wider) so unless you have particularly wide feet it's usually best to stick to whole sizes.
The size marked under your boot indicates the original Australian AU/UK size.
Please contact us if you have questions regarding this listing, size, style or fitting.