New without tags Southwick Pinpoint Oxford Button Down Collar Shirts.  Pale pink.  Manufactured by Brooks Brothers in North Carolina.  Locker loop, Slim Fit.

Brooks Brothers owned Southwick.  These were manufactured by Brooks Brothers in the US for Southwick.  Southwick is a brand which is typically sold in local menswear stores.  Quality of materials and workmanship is identical to Brooks Brothers.

Slim Fit.  Approximate measurement across chest at armpit level by neck size:
14.5  19.5
15     20
15.5  21.5
16     22.5
17     24
17.5  24.5

I combine shipping.