Hiya! Try Hearingaidheadbands.co.uk or search 'Hearing aid headbands' on Facebook and Instagram. They're custom made to measure headbands with pockets which hold the hearing aid in the correct place, little ribbons to stop little hands pulling them out, and because of the design, it doesn't matter if they don't sit direct behind the ear! Have a look and see what you think, we used them until our son turned around 8 months, then we found his ears were big enough to hold them properly. :)