The Argonaut Octopus, which is quickly becoming one of our most popular designs, is back in full stock. Get 'em while they're hot! Adult sizes: XS, S, M, L, XL, 2XL, 3XL and Youth Sizes: 2T, 4T, 6, 8, 10, 12. This is our first youth shirt that we have offered in size 12 Youth. The jump between 10 Youth and Adult XS was proving to be too big. Enjoy!