i-gel Size Calculator
Determine appropriate i-gel size based on patient height and estimated weight
Patient Information
Results
Enter patient information to calculate i-gel size
i-gel Size Reference Chart
Size 1
Pink
2-5 kg
Neonate
Size 2
Grey
10-25 kg
Small Pediatric
Size 3
Yellow
30-60 kg
Small Adult
Size 4
Green
50-90 kg
Medium Adult
Size 5
Orange
90+ kg
Large Adult
Size 1.5
Light Blue
5-12 kg
Infant
Size 2.5
White
25-35 kg
Large Pediatric
Medical References & Citations
i-gel Sizing Guidelines & Color Chart
Intersurgical Ltd. i-gel supraglottic airway – anaesthesia. Official product page with size, color, and weight specifications.
Manufacturer Sizing Chart i-gel Product Information
Intersurgical Ltd. General product page and downloadable information sheets covering adult and pediatric range (2–90+ kg).
General Product Info Ideal Body Weight Formula
Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974;8:650-655. Historical formula: Male: 50 kg + 2.3 × (height - 60 inches); Female: 45.5 kg + 2.3 × (height - 60 inches).
PMCID: PMC4841935 Clinical Note
This calculator provides estimated sizing based on manufacturer guidelines and historical weight estimation formulas.
The Devine formula (1974) serves as a first-level anthropometric screen but has inherent limitations in assessing body composition.
Final size selection should be based on clinical assessment per manufacturer and regional EMS user guides.
Always consider individual patient anatomy, clinical presentation, and follow your local protocols.
Have alternative airway devices readily available.