Panasonic MC-V295H Type C-19 HEPA Vacuum Bags - 4 Pack | Compatible with Panasonic Canister Vacuums | Ideal for Dust, Allergens & Pet Hair Cleaning

I have previously ordered the 2 pack vacuum bags one at a time and I liked the size and they fit my vacuum perfectly. This time I ordered 2 packs of these bags as it was a better price for two. However when I opened the first bag today, the vacuum bag is narrower which means it will fill much faster and I will need to change more often. I don't understand why the bag is smaller when the label is identical to the bags I purchased previously.