For the Sweatshirts they go up to 5x in size. For the other items that only had up to 2x available I have found some 3x options similar to what is offered in the sale. I have added these to check out. Here are the size specs and pics of the blank shirts for reference.
At this moment, they are sold out of black in the tanks, but I will update the site sale page if they come back in stock !
Gildan Ladies Longsleeve T
Only Grey is available in the long sleeve 3x , I will update if the other colors come back in stock.