Beach Theme Ensemble Wedding Invitation with natural starfish. | eBay. (pic 1 of 2) - shows outside view - 14 x 14 cm three folded square design invitation on shimmer board featuring perforated RSVP card for guests to simply tear off, put a stamp on & send back. Wishing well/gift poem verse at no extra cost, or a verse of your choice can be substituted. Priced at $5.40 for invitation, RSVP & gift poem verse in an invitation box. This invitation costs $1.20 to post.