Sticker pack by Sticko, new. The smallest bubble is approximately 1/4″ in diameter, and the largest is 1″. Please email me with any questions. “Free” shipping is a stamped parcel utilizing USPS’s standard first class mail. Tracking information is not available with this service. The percentage of postal issues is very low however, delivery may take longer than the “estimated” arrival dates that eBay provides. If you need tracking, please purchase the upgraded shipping of either first class package or standard shipping. If this option is not available, please contact me and I will revise the listing.