Hey Linda, thanks for taking the time to leave us a review, we really appreciate it. We're glad to hear that you're liking the product but sorry to hear that the sizing isn't perfect for you - you should still be able to move whilst wearing the product but it should encourage your body to maintain a healthy posture at all times, if you think that the product isn't a great fit for you then we'd be more than happy to offer you an exchange for an alternative size. If this is of interest, please email our customer care team (hello@flaminfitness.com) and they will be able to assist you.