I have 5 days to put the order through and am seeing if 3XL can be ordered but here is the sizing chart as is at the moment.
Here is the cut and fit look
Product Details
Preshrunk jersey knit
Fabric 30/1
Tubular construction
High stitch density for smoother printing surface
Shoulder-to-shoulder tape and seamed collar
Double-needle bottom hem
Rib sleeve cuffs
TearAway label
Oeko-Tex® Standard 100 Certified
Fiber content varies by color, see color list for exceptions