Overview
18x9 • 7.1" × 3.5"
18x9
7.1 inch length • 3.5 inch diameter
Penis Category:
large
Cock L/D ratio: 2
Cock Volume: ~1145 mL
Cock Cross-section: 63.62 cm²
Relative scales
Length (vs. 10–22 cm typical)
Diameter (vs. 4.0–7.5 cm typical)
Girth (vs. 11.5–23 cm typical)
Core metrics
Length
18 cm
7.1 inch
Category: medium
Real-world examples
• Banana ≈ 18–20 cm• 20 cm school ruler (metric) — slightly longer
• Tablet stylus ≈ 17–19 cm
• Desk thermometer ≈ 18–20 cm
• 18 cm ≈ 7.1"
Diameter
9 cm
3.5 inch
Category: thick
Real-world examples
• Small bowl rim ≈ 9–10 cm Ø• Compact camera lens ≈ 9–10 cm Ø
Circumference (≈ π × diameter)
28.3 cm
11.14 inch
Fit-critical value for sleeves & rings.
Surface & volume
Penis Surface index
~509 cm²
Penis Volume (cylinder)
~1145 mL
Penis Mass (≈ water)
~1145 g
Condom sizing guide
Recommended nominal width
141 mm
XXL / Wide
Closest catalog size: 72 mm (a bit tighter (-69 mm))
Also try (± stretch)
70 mm
71 mm
Stretch window (comfort)
• Target girth: 28.3 cm
• Comfortable range (≈ −8% … +8%): 26–30.6 cm
• As nominal width: 130–153 mm
• Comfortable range (≈ −8% … +8%): 26–30.6 cm
• As nominal width: 130–153 mm
Materials and brands vary — if in between, start with the closest and adjust.
Condom length tip
Standard length works for most (≈ 185–190 mm). Width map (45–72 mm)
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
Highlighted: need (computed) and best (closest available).
At a glance
Profile
• L/D ratio: 2
• Status: large
• Inch readout: 7.1" × 3.5"
• Status: large
• Inch readout: 7.1" × 3.5"
Handy links
Fun fact
Animal comparison
Target length: 18 cm (≈ 7.1" )
🐀 Rat (small)
Body ~18–25 cm (no tail)
🐀 Rat (small)
Body ~18–25 cm (no tail)