Depending on your fabric and the way you package it, in a legal size envelope 45 - 65 cents to send out your fabric to each person. Sending each one their finished block back 65 - 85 cents . Out of the US is $1.10 If you want to be totally safe figure $1.30 per person for how many is in your group. Postage goes up at the end of the month by a cent or 2, sorry my new chart is downstairs, but this is close.