So many helpers wow.
FYI and for those who need it:
I measured three locations on each stick. Both sticks have the leather wrap, I measured just in front of the wrap (front) and just behind the wrap (rear), then the very end if the butt (butt).
.
Ikon2 series 2
Front - 1"
Rear - 1 3/16"
Butt - 1 1/4"
P2
Front - 1"
Rear - 1 7/32"
Butt - 1 9/32"
That's 1/32" larger than the ikon2
Hope this helps.
Chris