Having pretty much gone straight back to work after the con, I've only just got round to trying on my T-Shirt...Or attempting to anyway. I requested the same size I always get (XXL), but have discovered this year's shirts to be a significantly smaller cut than previous years.
Where last year's Fruit of the Loom XXL shirt had a width of 66cm, this year's unbranded one was just 61cm, which is equivalent to XL in Fruit of the Loom's sizing. Had I known this beforehand I would naturally have requested a larger size.