We have an article called "TRAINING BELTS: THE BEGINNER’S GUIDE" which should give you a better idea of what type of belt you should use and you can find that at the following link. Ultimately your belt will depend entirely on you and your training which is why it is difficult for us to give a straight answer to this question for each individual person. https://anviltd.com/blogs/all-articles/training-belts-the-beginner-s-guide Some very basic starting points are: - The training belt style and any 6.5mm thickness belts are for lighter weight training as they are quite thin and will mould with the body. - Buckel and lever power belts 10mm thick are for heavy weight training and are by far the most common belt types and thickness. - 13mm thickness is for competition only and is very uncomfortable. You should only ever get 13mm thickness if you are 100% sure you know how stiff this thickness is and 13mm thickness should never be used in general training.