LINEN SLUB M L XL

The "LINEN SLUB SHIRT" you mentioned seems to be a type of shirt made from linen fabric with a slub texture. It also appears to have a double pocket design. The sizes available for this shirt are M (medium), L (large), and XL (extra-large).

If you're interested in purchasing this shirt, you can typically find it at clothing stores, both online and offline. Make sure to check with the specific retailer or brand for their available sizes and stock.