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Vintage Style Mud Brown 4 hole buttons Bulk (18.8mm) M-51 Jacket Military 30L | eBay
Amazon.com: 50 Wooden Buttons - 4 Holes - Available in 5 Sizes (12, 15, 18, 20 and 25 mm) - Produced in Europe (12 mm) : Tools & Home Improvement
Red 4 Hole Buttons
4 Hole 5/8" (15mm) 24L Vintage White Italian Small Buttons #547
Italian 4 Hole 1" (25mm) 40L White Vintage Buttons #526
How to Sew a 4-Hole Button | AllFreeSewing.com
Imitation Pearl Buttons - 4-Hole - WAWAK Sewing Supplies