This Create Your Own Calendar from Paper Accents is acid free, and make great gift ideas. Have fun decorating and personalizing these calendars with stamps, stickers, embellishments, marking pens, and more. Each calendar is spiral bound so they are easy to flip and stay together. Calendar information includes birthstones, flowers of the month, important holidays and calendars for future years. Each package includes one 12 month calendar that measures approximately 8.5" x 11". Made in the USA.