Depending on the products and shipping method, it usually takes about 5 - 7 days to receive your item after you had paid.
We have the experience of shipping items big and small. One of the frequent bigger sized orders we receive from customers are monitors. The biggest we shipped was a 43 inch monitor and it was handled, shipped and received by the customer without any problems.
On some occasions, there might be delay due to the seller of the products that the customers orders, not shipping in time, or public holidays in South Korea.