The ivory colour is from the regular sweatshirt line, and the other colours are from the pigment dye line, which costs more.
Sizing (chest width, length) in inches:
XS – 19, 25
S – 20, 26.5
M – 22, 28
L – 23.5, 29
XL – 25, 29.5
2XL – 26.5, 31
3XL – 28, 32