Inside Round vs Inside Skirt — What's the Difference?
Quick Answer
Inside Round (top round (inside round)) and Inside Skirt (inside skirt steak) are not the same cut: Inside Round is round primal (Inner thigh of the hindquarter); Inside Skirt is plate primal (Transversus abdominis muscle — the inner diaphragm muscle).
Canonical entities: Inside Round · Inside Skirt
Side-by-side
| inside round | inside skirt | |
|---|---|---|
| Primal | round | plate |
| Muscle / location | Inner thigh of the hindquarter | Transversus abdominis muscle — the inner diaphragm muscle |
| Character | A large, lean cut from the inner thigh (adductor and semimembranosus muscles). Sold as top round steaks, London broil, or roasts. Lean but can be tough — best sliced thin or braised. | The 'other' skirt steak. Thinner, wider, and slightly tougher than the outside skirt (which is the standard 'skirt steak'). Most restaurant fajitas use inside skirt because the outside skirt is exported or sold at premium. Requires high heat, fast cooking, and slicing against the grain. |
Key differences
- Different primals: round vs plate.
- Texture and slicing: compare fibrous, grain-heavy cuts vs more tender steak-style muscles based on each cut’s description.
- Retail naming diverges by country—always map through a canonical cut when translating menus or labels.
When to use each
Inside Round
Pick Inside Round when you want its specific marbling/texture profile: A large, lean cut from the inner thigh (adductor and semimembranosus muscles). Sold as top round steaks, London broil, or roasts. Lean but can be tough — best sliced thin or braised.
Inside Skirt
Pick Inside Skirt when its primal/muscle traits fit the dish: The 'other' skirt steak. Thinner, wider, and slightly tougher than the outside skirt (which is the standard 'skirt steak'). Most restaurant fajitas use inside skirt because the outside skirt is exported or sold at premium. Requires high heat, fast cooking, and slicing against the grain.
Inside Round and Inside Skirt are different canonical muscles/primals: Inside Round is round (Inner thigh of the hindquarter); Inside Skirt is plate (Transversus abdominis muscle — the inner diaphragm muscle).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: inside round (what-is) · inside skirt (what-is) · inside round hub · inside skirt hub