Overview
21x4 • 8.3" × 1.6"
21x4
8.3 inch length • 1.6 inch diameter
Penis Category:
above average
Cock L/D ratio: 5.25
Cock Volume: ~264 mL
Cock Cross-section: 12.57 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
4 cm
1.6 inch
Category: slim
Real-world examples
• Chicken egg width ≈ 4.2–4.5 cm Ø• Small jar lid ≈ 4–5 cm Ø
Circumference (≈ π × diameter)
12.6 cm
4.96 inch
Fit-critical value for sleeves & rings.
Surface & volume
Penis Surface index
~264 cm²
Penis Volume (cylinder)
~264 mL
Penis Mass (≈ water)
~264 g
Condom sizing guide
Recommended nominal width
63 mm
XL
Closest catalog size: 63 mm (spot on)
Also try (± stretch)
61 mm
62 mm
64 mm
65 mm
Stretch window (comfort)
• Target girth: 12.6 cm
• Comfortable range (≈ −8% … +8%): 11.6–13.6 cm
• As nominal width: 58–68 mm
• Comfortable range (≈ −8% … +8%): 11.6–13.6 cm
• As nominal width: 58–68 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: 5.25
• Status: above average
• Inch readout: 8.3" × 1.6"
• Status: above average
• Inch readout: 8.3" × 1.6"
Handy links
Fun fact
Animal comparison
Target length: 21 cm (≈ 8.3" )
🦔 Hedgehog (juvenile)
Body ~20–30 cm
🦔 Hedgehog (juvenile)
Body ~20–30 cm