High-Quality Materials: These binder rings are crafted from durable, rust-resistant metal and coated with vibrant, colorful paint. They're built to last! Ring Size: Each ring boasts an inner diameter of 25 mm / 0.98 inches and an outer diameter of 30 mm / 1.18 inches. Multicolored Variety: This set includes 50 binder rings in 19 assorted colors (light blue, yellow, coffee, pale yellow, pink, black, white, light blue, light purple, green, light pink, rose red, light gray, light green, royal blue, red, orange, blue, purple). The bright colors help you easily distinguish items and brighten your day! Easy to Use: Each ring is comprised of two parts connected by rotating rivets. Simply pull to open and press to close. A practical tool for organizing loose-leaf papers. Wide Application: These versatile rings are perfect for loose-leaf papers, flashcards, notebooks, scrapbooks, memos, photo albums, and even keychains! Easily bind loose items together.