Hello, welcome to Gürgen Tekstil � � For 158 cm height and 90 kg, size XL is generally preferred. The pattern of our model is comfortable and useful. To make a more accurate decision, you can compare it by measuring the width of the chest from the bottom of the arm to the bottom of the arm of a T-shirt that you use at home. The product dimensions are as follows: S: 53 cm M: 55 cm L: 57 cm XL: 59 cm. You can easily choose the size that suits you best according to these measurements. If you purchase the product and are satisfied, we would be very happy for your evaluation and leave the comment. We thank you for your interest and wish you a good day. � �