Yes, many storage boxes and carrying cases are designed with adjustable dividers or foam inserts to fit both standard-sized trading cards and graded slabs. Wholesale buyers often choose versatile models to reduce SKU complexity and appeal to a wider audience. For example, hobby shops benefit from carrying one universal storage solution that works for Pokémon, MTG, sports cards, and PSA/BGS graded slabs. This flexibility makes storage cases a profitable product line for B2B distributors.