Thank you for your feedback on our Delux Vertical Ergonomic Mouse! We're glad to hear that it has helped improve your posture. We understand that it may feel a bit too big for smaller hands, this mouse is recommended for those who has Medium to Large Hand Sizes. Please remember our 30-day Returns & Refund Policy as well- if you find it unsuitable within that period, we are happy to do an exchange or refund. π