Size XL. Not used because it wasn't right for our dog's egg shape head.
BENCMATE Protective Inflatable Collar for Dogs and Cats - Soft Pet Dog Cone Recovery Collar Does Not Block Vision E-Collar(Medium, Blue)
https://www.amazon.co.uk/dp/B071VG5DYT?ref=cm_sw_r_cso_wa_apan_dp_5MDJJCJNZ...
Inflatable Post Surgery Dog Collar (London SE17)
This offer has been gifted to someone and is no longer available.