Overview
21x3 • 8.3" × 1.2"
21x3
8.3 inch length • 1.2 inch diameter
Penis Category:
above average
Cock L/D ratio: 7
Cock Volume: ~148 mL
Cock Cross-section: 7.07 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
21 cm
8.3 inch
Category: long
Real-world examples
• A4 short edge = 21.0 cm (exact)• Chef’s knife blade (small) ≈ 20–21 cm
• DL envelope long side ≈ 22 cm (slightly longer)
• Two credit cards end-to-end ≈ 17.2 cm (shorter)
• 21 cm ≈ 8.3"
Diameter
3 cm
1.2 inch
Category: slim
Real-world examples
• Highlighter ≈ 2.5–3.0 cm Ø• Door knob stem ≈ 3.0–3.5 cm Ø
Circumference (≈ π × diameter)
9.4 cm
3.7 inch
Fit-critical value for sleeves & rings.
Surface & volume
Penis Surface index
~198 cm²
Penis Volume (cylinder)
~148 mL
Penis Mass (≈ water)
~148 g
Condom sizing guide
Recommended nominal width
47 mm
XS / Tight
Closest catalog size: 47 mm (spot on)
Also try (± stretch)
45 mm
46 mm
48 mm
49 mm
Stretch window (comfort)
• Target girth: 9.4 cm
• Comfortable range (≈ −8% … +8%): 8.6–10.2 cm
• As nominal width: 43–51 mm
• Comfortable range (≈ −8% … +8%): 8.6–10.2 cm
• As nominal width: 43–51 mm
Materials and brands vary — if in between, start with the closest and adjust.
Condom length tip
Consider longer sleeves (≈ 195–200 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: 7
• Status: above average
• Inch readout: 8.3" × 1.2"
• Status: above average
• Inch readout: 8.3" × 1.2"
Handy links
Fun fact
Animal comparison
Target length: 21 cm (≈ 8.3" )
🦔 Hedgehog (juvenile)
Body ~20–30 cm
🦔 Hedgehog (juvenile)
Body ~20–30 cm