These natural signing stones are a unique alternative to the traditional guest book.There are approximately 15-20 stones for signing.Signing pen is not included -- a permanent fine or medium point marking pen is recommended.Display stones by the vase.Guests may pick a stone and write their names or a small message onto the stone and place it into the vase.The signed stones and the vase make an attractive home decoration and a memorable keepsake of the attending guests.Stones measure 4-9 cm.