The Bristol stool form scale

Type 1 type1 Separate hard lumps,
like nuts (hard to pass)
Type 2 type2 Sausage-shaped
but lumpy
Type 3 type3 Like a sausage but with
cracks on its surface
Type 4 type4 Like a sausage or snake,
smooth and soft
Type 5 type5 Soft blobs with clear-cut
edges (passed easily)
Type 6 type6 Fluffy pieces with ragged
edges, a mushy stool
Type 7 type7 Watery, no solid pieces