It's slightly smaller than the Kenmore Q Hepa Cloth Bag [which isn't found anywhere - generic only]. It's solid and works well. I ALSO Bought - Kenmore Canister Allergen Filtration Dust Bags to Fit 5055, 50557, 50558 and Panasonic Style C-5 - 3 Packs. They are much larger and look good in design. However, I haven't used any yet.