Hi Allen & all UK small sized marshmallows are cylindrical, 13 mm diameter and 13 mm long. I devised a specially shaped hole just to suit them... http://website.lineone.net/~dave.cushman/queenbanking.html The tool that I used to generate the stepped profile hole is a 'Bradrad' multi diameter drill bit http://website.lineone.net/~dave.cushman/bradrad.html Best Regards & 73s... Dave Cushman, G8MZY Beekeeping & Bee Breeding Website... http://website.lineone.net/~dave.cushman