Yoki green & brown winter lace up duck boots size 8

Yoki, green & brown lace up, faux sherpa, faux leather, winter duck boots. Size 8 Preowned, see pictures for condition. These did not have a material content tag or size, they measure approximately 10.5” on the outside, I wear size 7 and these are a little bit big for me, that’s why I suppose they are size 8, the conversions I found for inches and sizes say that 10.5” is size 10, but these are definitely not size 10. Any questions, please message me. Thank you!