Sellier & Bellot 12 ga. 3" Mini-Magnum England sizeBB=2

Sellier & Bellot 12 ga. 3" Mini-Magnum BB English size American size would be size #2 performance in a compact 3" load designed for hunters who demand reliable stopping power. Each round features a heavy 42.5g (1 1/2 oz) payload for strong impact energy, making it ideal for medium-game and varmint control. Loaded with ENGL A / US BB (4.5mm) shot, these shells provide excellent penetration and consistent patterns in the field.

The description on the box says it's a 2 3/4  on the last two pictures you'll see 3-in shell next to it and a 3-in shell box this shells are 3" there's a description on the box with the show length and the lead size where it states it's a BB but it's a number 2.