Material and Design: Soft and elastic rubber material, good hardness, resistance to stretching and no deformation, soft hand feeling, hollow design, comfortable and breathable. Suitable for everyone: suitable for children, adults, preschoolers, comfortable for both right-handed and left-handed people . It can help to cultivate children's interest in writing and adults to improve and correct their handwriting posture. Pen posture correction: Ergonomic design, develop good habits from the beginning, let the small hand muscles get used to the fine exercise, and quickly master the correct posture to hold the pen. Size: Suitable for gel pens or gel pens with a Diameter of 7-8mm. The total length of the pencil clips is 4.9 cm and the width is 4 cm. Package Contents: 4 pen holders, in 4 colors: Pink, blue, orange and green, which can be used as children's birthday gifts or school gifts to help children learn better. Note: The data are all measured manually. Please allow an error of 1-3cm. Due to the difference between light and display, there is a certain color difference, which depends on the actual object received