One pair (2 pieces) of baby sling rings. Perfect for handmade projects! These rings were purchased in bulk to make a baby sling for my beloved, clingy dog who loves being held. They have been stored for a long time without use and have discolored, with uneven coloring (see image 4). No welded joints. Size: Inner diameter: Approximately 6 cm Outer diameter: Approximately 7 cm Thickness: Approximately 5 mm Weight: Approximately 27.5g (per ring) Please refer to the images, which include a ruler for size comparison.