Shop with the following merchants for mens size 16 shoes:

Zappos Mens Size 16

Zappos features over 900 pairs of mens size 16 shoes, from athletic shoes to dress shoes, from Allen Edmonds, Ugg, Cole Haan, and many more name brands.
Free Shipping and Free Return Shipping on all items, every day. Order several items, try them on, and return the ones you don't want -- all Free.

Macy's icon

Macy's features size 16 mens shoes from Sperry, Dockers, Calvin Klein, Johnston and Murphy, and more.
Sale - Extra 25% off + Free Shipping at $75 with code PREVIEW during Macy's Fall Preview Event! Exclusions apply, see website for details. Shop now at macys.com! Valid 8/21-8/24

Nordstrom features over 150 pairs of name brand shoes in mens size 16, from designer brands to casual shoes.