Find our sizeguide for Kilpi below. The measurements shown are not referring to the clothes but to the body measurements fitting each size in question. This guides helps you find the right size. Kilpi clothing comes in three types of fit: Slim Fit, Regular Fit and Activ Fit. If there is no reference to which fit a specific garment is, it will always be Regular Fit. Our experience with sizes for upper body clothing is, that Slim Fit and Activ tends to be more tight than Regular Fit. However, You should be aware that they are all preshaped, which shows from the pictures for each product. Therefore it is worth considering ordering one size larger than usual.
Our best advice if you cannot decide between sizes, is to order both of them and keep the one that fits you the best, and then you can return the other one afterwards.