Product size about : Diameter: 7.3cm/2.8'' Circumference: 23cm/9'' Product color: As shown in the figure Product material: product features: 1. Color coding improves grip learning: The training baseball features an innovative color-coded finger marking system that serves as a functional guide for a variety of training; these markings illustrate four-seam fastballs, two-seam fastballs, curveballs and curveballs, sliders; this learning aid can help beginners master complex baseball techniques, whether you are a left-handed or right-handed player, our training baseballs can meet your needs; the specially designed fingerprints fit any player's grip, further providing a more diverse and inclusive training experience 2. Standard size and weight: The standard circumference of each training baseball is about 9 inches and the diameter is about 2.8 inches, which complies with the official size and weight standards of baseballs; this makes it perfect for different training requirements and can also be used in actual games and competitions. 3. Premium design for optimal performance: relying on the reliable quality of the training baseball, it has a rubber inner core and PVC outer skin; this combination of resilient materials gives the baseball excellent durability and performance, making it ideal for long-term training and regular use 4. Ideal training tool for beginners: This baseball training equipment may be a good starting point; it is specially designed to help new players quickly master various serving styles and is a great basic training tool for baseball novices 5. Gift: You can give this baseball to beginners who are learning baseball. It will increase the experience of baseball grip for beginners so that they can show their skills during the game. Precautions: 1. As we know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Fingerprint Baseball