When you’re shopping for clothing in a retail store, it’s fairly easy to try on an item to make sure it’s the right size. Since online shopping lacks this physical component, you generally have to make the same decision based on your prior experience with the brand, other customers’ reviews, and a very low-tech companion: the size chart.

I’ve seen size charts that range from extremely helpful — complete with tips on performing your own measurements — to those that are confusing and frustrating. But the presence of size charts on virtually every retail website shows that customers have come to expect this type of resource. And it makes me wonder: why don’t retailers provide these size charts in their brick-and-mortar stores, as well?

It really seems like a no-brainer: put up printed versions of the size chart in key departments and near the dressing rooms. Customers and employees alike can refer to them, and reduce the number of wasted cycles of trying on clothes that have no chance of fitting right. Plus, it provides additional continuity between the online, catalog, and in-store shopping experience. Considering how rarely these sizing guidelines change for a given retailer, making size charts readily available in retail locations should be a low-cost way to sell more products and create happier customers in the process.