What you mean by 4 level? you want theme with multi level theme ? because for product you can set collection or open it direct.
Although I don't sell clothing, I will use clothing for my explanation.
I want to choose from a broad category such as shirt, then choose men's, then a size, then a color. I see templates with three levels of selection but not the fourth.
Is there a template such as this? Thanks for any suggestions.
No We have not any template like that you have to develop custom template for that, so you can make selection. for that may be you need developer help.