We will always show all the products and sizes that we have in stock on our website. Usually we will only get one shipment, for example for each boot colourway, and no restocks.
The reasoning is that the big brands put out new colourways roughly every three months, and we like to focus more on always having the latest colourway than restocking older models. In regards to shirts, we always strive to have all sizes in stock for the big clubs.
You are of course always welcome to contact us via email@example.com if you want to inquire in regards to a specific product.