KangolHeadwear Cotton Twill Army Baseball Cap

Is there a big difference in the l/xl and the xxl ? my green fits nice but black is just a bit smaller so shd i go for black xxl ?

What is the largest available size?

i have 2 of these, black and green, Authentic, but the black forehead is 1 cm smaller than the green. is tat an odd discrepancy ?

What length in inches is the peak?