sacai fragment sizing

Can anyone advise, stockx says the sizing from UK to US Sacai is exactly 1 size up difference, but on my Sacai box it says UK 3.5 is a US 4? :(

Losing the Faith: Christians in Minority in England and Wales sacai fragment sizing Spain Spared Brussels Deficit Sanctions Before Election sacai fragment sizing How Egyptian Muslims Are Persecuting Coptic Christians sacai fragment sizing U.K. Government Should Provide Parenting Lessons: Public Health President sacai fragment sizing

sacai fragment sizing Gold White Black Red Blue Beige Grey Price Rose Orange Purple Green Yellow Cyan Bordeaux pink Indigo Brown Silver