These come with three sets of earbuds. You might be forgiven for thinking they'd be small, medium and large. Well, in comparison to Sennheiser for example, they are medium, large and extra-large. Which is hard luck if like me you need small. I checked with Plantronics support and they promptly confirmed that they don't do any other sizes of earbuds. Seriously? Are european ears really smaller than american??
I've ordered some third party 'extra small' earbuds that fit a variety of connectors, so in two - four week's time I'll know if I've got a result, but this is ridiculous.
Update: Extra Small Black Silicone Earbuds
have arrived and do the job, so upped my rating two stars. I prefer the BackBeat 903+
for general use, but in quiet environments the spillage is noticeable, so the Go's are ideal in the office but still prone to slip out.