The belt sizes are divided into M (size 1) and L (size 2).
Here are the corresponding data for the belt sizes:
M (size 1), total length 105cm (excluding the buckle), width 4.2cm, fully adjustable, suitable for waist circumference within approximately 105cm;
L (size 2), total length 115cm (excluding the buckle), width 4.2cm, fully adjustable, suitable for waist circumference within approximately 115cm;
The Y belt is partially adjustable, with the approximate range for size 2 being 170 - 186cm.