The Bristol Stool Form Scale

Stool form correlates to intestinal transit time, listed below from slow to fast transit.

Type 1: Separate hard lumps, like nuts

Type 2: Sausage-like but lumpy

Type 3: Like a sausage but with cracks in the surface

Type 4: Like a sausage or snake, smooth and soft

Type 5: Soft blobs with clear-cut edges

Type 6: Fluffy pieces with ragged edges, a mushy stool

Type 7: Watery, no solid pieces