Right, I've bought a load of stiffened C5 envelopes, at 14 pence each. I can get 3 snoods in one envelope and it will go as a large letter.
1 snood is under 100g so postage will be £1.05/£2.45 for 2nd Class/2nd Class signed for.
2 snoods are exactly 100g. I think I'll need to take them to the PO so they can weigh them because anything over 100g goes into the next price bracket, and I don't want to end up asking people for more money or having to refund loads of people. It will either cost the same as 1 or the same as 3 - there's no price bracket in between.
3 snoods will be in the second price bracket of £1.65/£3.05 for 2nd Class/2nd Class signed for.
I haven't looked at the international ones yet. Once I have a confirmed cost for sending 2 snoods I'll message everyone my Paypal details and start getting them packaged and posted.