Is it possible to specify the size and weight of a product you're selling without having to mark it as a 'variation' in the product's store page?

My family's small business is putting together a new website, and they usually ship by UPS Ground or USPS Priority. Trouble is, while Squarespace does have those as shipping options they require you to have the weights and dimensions of the products first, and the only way I've found to add that data to a product is through the 'variations' feature, but that'd create a size option block in the store that might confuse the customers.

Is there any way I can put this data in for a product without having to add it as a variation?