Something that's always important for SEO is to have clear URLs. You want to have one clear term in your product category page. So, you might want to have the following:

• t-shirt
• tshirt
• tee

But you definitely don't want this:

• t-shirt-tshirt-tee

Search engines will likely penalize you. So, make sure you pick the most popular option for your industry and use that. If you already installed an SEO plugin such as Yoast SEO, you can edit the Slug field:

If you aren't using Yoast SEO, you can do this in WooCommerce itself under Products | Categories | {{pick a category}} | Edit and then edit the Slug field.