A Cloth Merchant
While few of us sewists look forward to using a seam ripper, when you need one, this is the best we've found. It has a fine point to get into tiny stitches, and a blade that hasn't dulled on us yet (and we use this a lot).
Made in Japan
2-Hole Horn Toggle
32mm Concave Horn Button - Brown / Black
50 Fabric Animals - Marie Claire
A Textile Traveler's Guide to Guatemala - Deborah Chandler