Silicone. Unique Design: These bookmarks are designed in the shape of sprouting seedlings, look cute and fresh, can bring you better reading experience. Package includes: 8 pieces little green grass bookmarks, useful and trendy, help you enjoy a day with a great book, and never lose track of your favorite novel again. Size and Material: Each sprout little green bookmark is 4.5 cm/ 1.8 inches in length, and 4.3 cm/ 1.7 inches in wide;The bookmarks are made from soft, flexible silicone. Widely Used:The practical bookmarks are nice for students, writer, reader and so on, especially for bookworm and book lovers, these bookmarks can help you mark your page of books, insert them into your novels, textbooks, journals, theses, notebooks, diaries, magazines and so on. Best Gift Choice: Creative grass bud shape bookmarks are best gifts for friends and family, not only as a bookmark, but also as a gift card, decorative items, etc. these bookmarks will let you /your family/your friend fall in love with reading.