Kidney Stone Size Chart in MM and Treatment Options
Dr. Sivabalan J
Urology · Iswarya Hospital
The size of a kidney stone in millimetres determines the best treatment approach — from waiting for natural passage to surgery. Here is a complete guide.
Kidney stones (renal calculi) range in size from a grain of sand to a golf ball. The size — measured in millimetres — is the primary factor in deciding treatment.
Kidney Stone Size Chart
| Size | Category | Likelihood of Passing | Typical Treatment |
|------|----------|----------------------|-------------------|
| < 4 mm | Small | ~80% pass on their own | Conservative management, fluids |
| 4–6 mm | Medium-small | ~60% pass spontaneously | Medical expulsive therapy (alpha-blockers) |
| 6–10 mm | Medium | ~20–40% may pass | Lithotripsy (ESWL) or ureteroscopy |
| > 10 mm | Large | Unlikely to pass | PCNL (Percutaneous Nephrolithotomy) or surgery |
Types of Kidney Stones
Symptoms of Kidney Stones
Diagnosis
Treatment Options by Size
*Small stones (< 4–5 mm):*
*Medium stones (5–10 mm):*
*Large stones (> 10 mm):*
Prevention
Iswarya Hospital's Urology department offers complete kidney stone management including laser lithotripsy and PCNL.
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