I don't think your quantity is very large, is it? Do you have a customer order? Do you have specific color specifications and fabric types? Physical indicators such as color fastness and strong formaldehyde index?

If so, follow the requirements in the order. After negotiating the price with customers and suppliers, you only need to make sure that there are some profits (including estimating the loss of overflow, second-class products and defective products).

If not, you just want to make a batch of pants yourself. Then you can look for trading companies that do this kind of business first. They usually have a set of prices. In addition, you can do market research to see what the market can accept, and then you can find a factory to help you do it. At this time, of course, you can boldly talk to them about the price.

In addition, if the quantity is not large, you can go to the factory to get their stock. Generally, there will be some goods that cannot be delivered in a factory, which is not necessarily a quality problem (no factory can deliver 100% of each order, for example, if customers are too large, they will either give them to customers or sell them as second-class or even defective products). Of course, this requires you to have certain negotiation skills, not to mention that you are not familiar with them.

I hope it helps you. Good luck!