Is it legal for a shop to refuse to exchange sale item of clothes or exchange?
If there is nothing materially wrong with the item, then the shop is perfectly within its rights to refuse to exchange any item. The fact that it’s a sale item is neither here nor there. If you bought the wrong size, then I’m afraid it’s your mistake. Only if the item has a material defect; or is not fit for the purpose it was meant for do you have a valid legal remedy.