They all have a ventilation hole and firing stand marks.
Three Vintage Blue & White Floral Decorative Ceramic Balls / Carpet Balls, 4 cm
2x Medium Decorative Ceramic Balls Japanesee Floral Pattern Carpet Balls
Two Vintage Black & White Decorative Ceramic Balls/Carpet Balls - 10 & 8cm
Two Vintage Black & White Floral Decorative Ceramic Balls / Carpet Balls, 8 cm
Two Vintage Blue & White Striped Decorative Ceramic Balls / Carpet Balls, 10 cm
