Jeans
Cut names like "straight," "slim," or "relaxed" aren't standardized across brands, so the same name can describe genuinely different amounts of room through the thigh and leg opening depending on who makes the jeans. A "slim straight" at one brand can measure closer to another brand's "relaxed" cut at the identical waist size — the cut name is a starting point, not a guarantee of a specific silhouette.
Rise still does most of the work in how a pair of jeans actually sits, independent of the leg cut: a high-rise straight jean and a low-rise straight jean in the same waist size will sit at noticeably different points relative to the natural waist, which changes how the whole leg reads even when the thigh and hem measurements are identical.
Denim weight and stretch percentage decide how a pair wears in over time. A rigid, low-stretch denim holds its cut measurements and typically needs to fit snug when new, since it will relax slightly with wear; a denim with a higher stretch percentage fits closer to true-to-size from the first wear and holds that fit rather than continuing to loosen.
Jeans at retailers

Old Navy
Straight Jeans

Gap
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans

Uniqlo
Straight Jeans
ASOS
ASOS DESIGN mid rise straight jeans in vintage lightwash
ASOS
ASOS DESIGN low waisted slim straight jeans in inky wash
ASOS
ASOS DESIGN high rise slim straight jeans in bright mid blue
ASOS
ASOS DESIGN Tall mid rise straight jeans in lightwash with rips Circular Design Collection
ASOS
ASOS DESIGN high waist slim straight jeans in rinse
ASOS
ASOS DESIGN Tall 90s straight jeans in midwash
ASOS
ASOS DESIGN Petite mid rise straight jeans in light mid blue
ASOS
ASOS DESIGN Circular Design Collection 90s straight jeans in authentic midwash
ASOS
ASOS DESIGN 90s straight jeans with crease detail in lightwash blue
ASOS
ASOS DESIGN Petite mid rise straight jeans in light mid blue