I bought a T shirt on Lazada and was prepared to take a loss if it didn't fit. It was perfect so I bought two more.
I don't buy anything online unless I am 98.8% sure it is correct and even then I am prepared for a loss if it is not exactly what I wanted.
As for the package, when paying COD. If it is approximately the correct size for what I ordered then OK. If a lot smaller. No.