8" x 8" are my favourite cards (in fact I tend to stick to this size if truth were known). Having a box to put them in would be fantastic. For the everyday ones the envelopes are fine, but when making something special I usually wrap them in plenty of bubble wrap and then send them in large padded envelopes. I think having a box to go with them would be great. When I sent my sister's birthday card last November she asked if I had any 8" x 8" boxes I could let her have because she thought it might make it easier to keep her cards safe. So Jacqui, you're not alone - I'm with you on this one.
Margaret x