Is 4E the widest shoe?

Could you clarify what you mean by "4E" in the context of shoe widths? Generally, shoe widths are categorized using letter sizing, such as A, B, C, D, E, etc., with each letter representing a wider width than the previous one. However, specific brands or manufacturers may have their own unique sizing systems. Assuming that "4E" refers to a shoe width in this context, it would typically indicate a very wide shoe, but whether it's the widest available can depend on the specific brand or retailer. Are you asking if 4E is the widest shoe width offered by a particular brand or retailer, or are you seeking general information about shoe widths?