This Trideer Mini Exercise Ball in Blue measures 23cm and is ready for use straight out of the box. The ball is made with high-quality materials to ensure durability and safety during exercise. It is perfect for various workouts including Pilates, yoga, and strength training. The ball is a great addition to your fitness routine and can be used by both beginners and advanced fitness enthusiasts. The Trideer Mini Exercise Ball is branded by Trideer, a reputable fitness equipment manufacturer recognized for quality and reliability. Please view all photos. Zoom in on photos for a close-up view. Thank you for your support! I work hard to provide the best customer service possible. If there are any issues with a purchase, PLEASE CONTACT ME directly through messaging. I will always do my absolute best to resolve any issue and be honest and fair in any situation. IF YOU BUY MULTIPLE ITEMS FROM ME - PLEASE utilize the cart feature pay for everything at one time! This saves you time helps me save on fees and keep my pricing low! FAST FREE SHIPPING!!! THANK YOU SO MUCH FOR CHECKING OUT MY STORE, PLEASE COME BACK!?