If you want a navy blue pocket square I would omit 'navy' as it is so dark that it is much closer to jet black or at best a very dark "midnight blue" . The material itself seems cheap, but that's what I expect for less than $10.
Assorted Women's Cotton Handkerchiefs in GB
9 Review
5-Piece Men'S Silk Pocket Square Handkerchiefs Set By SHLAX&WING
11 Review
8-Pack Men'S Cotton Handkerchiefs
39 Review
𧣠Cotton White Handkerchief Set - Pieces of Hankies
Tipsy Elves Santa Spinner Festivities Men's Accessories for Belts
58 Review
Nylon Salmon Belts with Steel Buckle
51 Review
Optimized Classic Leather Ratchet Click Men's Accessories and Belts
50 Review
Kenneth Cole REACTION Perfect Adjustable Men's Accessories
56 Review