The size chart is situated next to the product image above the size selection. It is marked in red - see the picture below.
a) if you are using a computer version of our page: click on the size chart, the list of products will be displayed.
Then you can choose the type of product you are interested in by clicking on it and the size chart will be displayed:
b) if you are using a mobile version of our page:
Scroll down the page and under the Shipping and Return tab, you will find a size chart (see pictures).