PLEASE NEED HELP REALLY BAD

Good day, I have a shoe store. The issue is that whenever I upload a product, it has different sizing. For example, Nike has different sizing than Adidas, and so on. I’ve been looking for a way to create a metaobject for sizing for Nike, Adidas, UGG, etc., so that whenever I upload a product, I can simply select the respective metaobject, and the sizes will be uploaded automatically without having to fill them in manually. Is there any way to do this, please?

So I would create specific sizing for Nike, Yeezy, UGG etc and then when I would want add any product I would just choose my created sizes and I would not need to do it manually. Is there this option? PLEASE<3