The "Marsupi 2.0 Breeze" in the size noted as "S/M" corresponds to a waist circumference of 60-100 cm. Here are the specific size ranges for Marsupi baby carriers:

- S/M: 60-100 cm
- L: 75-105 cm
- XL: 90-120 cm
- XXL: 105-135 cm

Since your product is labeled as "S/M," it fits a waist circumference of 60-100 cm.