Laser-cut maple meeple shapes, painted in red and green, or unpainted, and available in 1″ or 3″ sizes from Hard Boiled Meg via Etsy:

Meeple Christmas Tree Ornaments

Or from MeepleSource, 3″ rubber meeple ornaments, available in multiple colors, or as Santa and elf characters:

Santa and Elf Meeple Ornaments