We call this a polo-neck but others call it a roll-neck. Whatever you call it, this top has thick fabric, long sleeves, a tall neck that you can fold down and a very pretty pumpkin embroidered on it. 
 
Sizes are men's sizes:
S - 36/38"
M - 38/40"
L - 42"
XL - 44/46"
XXL - 48"