It is size no. 12

I use the glove (size 12) for the fireplace stove and occasionally for the barbecue. The insulation is completely sufficient for normal use. The size also fits very well, although I have rather large hands.

In fact, the label says 12. I wouldn't recommend it though - poor insulation and not ideal for long handling (I have a kamado).

I bought the bigger one for myself, but people with smaller hands can use it too