For simple OEM processing, just decide which style is more suitable for your trademark and make a simple design drawing. Provide the drawings to the processing plant.

The processing factory that makes shoes will make samples according to the design drawings. Once the samples are confirmed, they can produce large quantities of goods.

Of course, I’m not sure about the source of goods you mentioned. Is it in stock? Is it a finished product? OEM processing is actually custom-made. If your problem is that you already have a finished product, how to put a trademark on the finished product, it is not easy.

If the product is a shoe with a simple style and no obvious trademark, you can put your own trademark on the packaging.

If there is already an obvious trademark on the finished product, there is nothing you can do.