Review on Classic Style for Boys: Dickies Long Sleeve Oxford Shirt by Jason Lockwood

My son is between sizes. I bought him size 14/16 and he fits everywhere but the collar is too tight for him. If anything, it looks smaller overall. Also bought 18/20 but it's a bit baggy but the collar fits perfectly. Still trying to decide what to do to issue a refund, aren't you? My son is 10 years old and his height and weight is in the 80th percentile for his age. He usually wears AM in t-shirts (not form-fitting). Neck circumference 16.5 and arm length approx. 30.