There's evidently a case for both transparent and white background - I'd probably lean towards the latter if it was a choice of just one, but would be happy with either.



Logo only, particularly if you're trying to strengthen the graphic identity of Kodi - it's also more likely to be a sticker that you'd use IMO. The best branding only needs the logo.



Size: 5cm square sounds about right (2x2) - I don't personally see so much use for a big one (7.5cm + ), but I suppose you could offer some if it's only a marginal cost to produce them (I doubt they're much more once you have a production run of smaller ones lined up). If you want larger, then maybe K + Kodi (as an explanation) in landscape works better then, though I've no idea what you'd stick it to beyond the back of a pickup in Alabama.



Re: shipping - you could ship a batch of them to somewhere like the Netherlands (even pre-packaged and pre-addressed) and then ship out from there to European countries for next to nothing (especially given $:€ rates...), and I'm sure there are equivalent hubs in AP and C/LA. Payments to Ned Scott Enterprises @ PayPal would be fine, certainly for shipping - whether the stickers are a marketing cost to the Foundation or whether you'd want to charge for (a portion of) those is your call, but the total cost has to be a consideration (versus the slavering desire we all have to have all things Kodi-like, of course).