HISDERNMen's Inner Contrast Shirt Casual Formal Classic Button Down Dress Shirts Long Sleeve Plaid Collar Regular Fit

Does anybody know of a company that will do a shirt like this for the larger male?

Description states button down collar. Pictures does not show button down collar. Which type of collar does the shirt have?

where is the size guide in inches or cm?

does this shirt hav a 19inch collar