I bought a few sets of furniture at the mall and paid a sub part of the money at that time. Later, n

If the merchant makes the size wrong, the merchant should be responsible. If you make a mistake in the size, you can't return it.

You see if the shopping mall where you buy the goods has no reason to return or exchange the service, if so, what is the time limit, whether there is a shopping mall contract, for example, there is a delivery within 30 days of no reason to return the goods, as long as you have the shopping mall's receipt voucher, you can ask for return and exchange, no need to pay freight and handling fees. If it is a small store brand, you can negotiate with the boss to change to other styles, generally you can agree, if you want to ask for a return, you need to pay storage costs, freight and handling fees, you these pieces of furniture, for you to reserve for a year, the cost is not low.