tummy trainer is just a elastic belt or does it has velcro so that one can adjust the size and tightness?

Hi Preeti, thank you for your enquiry, the Tummy Trainer does have velcro so that you can adjust the size to suit your shape. We hope this helps. ?For further information on this or any of our other products available, if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have. We hope this has helped with your query.