is there any suggestion on how to set up items of apparal?

[shengtangpeony]

how you do to distinguish the colors and sizes of items?

[RHatch]

Do you want to track inventory with in Square Point of Sale?

[Kpay]

@shengtangpeony, it sounds like you might benefit from using item variants - you can read more about item variants and price points in our Support Center.  Let me or @RHatch know if you have trouble setting it up - happy to help if you get stuck.