LGB #16000 Curved Track, R3, 22.5 Degree You are ordering 1 piece of curved track. Complete circle (8.1 foot diameter) is 16 pieces. Wide-radius R3 curves are perfect for your biggest trains. 22.5 means 16 sections make a 360 degree circle. R3 radius forms a 2486 mm (97.9 in) diameter circle. You can order 1 or more pieces. 12 pieces come in a full box.