How do I measure my erect girth correctly?

When fully erect, wrap a soft fabric tape (or a strip of paper, then measure against a ruler) around the thickest part of the shaft, usually mid-shaft. Pull the tape snug but not tight. Record the circumference in centimetres. The average UK adult erect girth is roughly 11.7 cm (Veale et al. 2015, n=15,521).

What is nominal width and why does it matter?

Nominal width is the width of a condom laid flat, which equals half its inside circumference. To match yourself: divide your erect girth in millimetres by two. If your girth is 12 cm (120 mm), your ideal nominal width is 60 mm. A correctly-fitting condom feels snug but not constrictive, with about 1 cm of room at the tip for the reservoir.

What happens if a condom is too tight or too loose?

Too tight increases breakage risk and discomfort, the latex is stretched past its design tolerance. Too loose increases slippage risk, which defeats the contraceptive and STI-prevention purpose. Aim for nominal width within ±2 mm of your calculated ideal; many manufacturers list this on the box in fine print.

I have a latex allergy. What are my options?

Polyisoprene (Mates Skyn, Durex Real Feel) and polyurethane (Durex Avanti) are the two non-latex condom materials available in the UK. Polyisoprene feels closer to latex; polyurethane is thinner, transmits heat better, and is the only condom material that tolerates oil-based lubricants. Lambskin is also non-latex but does not protect against STIs.

Are larger condoms always better if I am between sizes?

When between sizes, size up rather than down. Slippage from a slightly-loose condom is preventable with correct application; breakage from a too-tight condom rarely is. Test brands until you find the one that stays put without pinching.

Do thinner condoms break more easily?

No. WHO standards require all condoms sold in the UK to pass the same air-burst and tensile tests regardless of wall thickness. "Thin" or "ultra-thin" refers to latex wall thickness only (typically 40-60 microns vs 70-80 for "extra safe"); the breakage rate is statistically identical when used correctly.

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Condom fit finder.

Most men buy the wrong condom. Standard 56 mm fits the UK average (girth 11.7 cm), but the range is wider than the shelf. Type your erect girth in centimetres; get the UK-stocked condoms whose nominal width actually matches you.

Erect girth (cm) UK average is 11.7 cm (Veale 2015). Erect length (cm) optional Used only to flag length issues.

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Your ideal nominal width: mm. Range: - mm.

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condoms match your fit

No condoms in the catalogue match those filters. Try relaxing the style filter, or check the full table below.

Type your erect girth to see ranked condom matches.

Common scenarios

UK average (11.7 cm girth) → Snug fit (10.5 cm girth) → Large fit (12.5 cm girth) → XL fit (13.5 cm girth) → Latex allergy + UK average girth →

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We will send the matched condoms and a 10% first-order code if you want to try them via BondageBox. Plain UK delivery, BBox on your statement.

The full UK catalogue

Every UK-stocked condom in our catalogue, listed by nominal width. Latex unless marked otherwise.

Snug fit (≤52 mm)

Brand & Name	Width (mm)	Length (mm)	Material	Tags
Pasante Trim Smallest mainstream UK condom. NHS-favourite for snug fit.	49	170	latex	snug
EXS Snug Fit EXS's smaller-fit variant, vegan-friendly latex.	49	180	latex	snug
My.Size 47 Specialist German size; rare on UK high street.	47	160	latex	snug, custom-fit
My.Size 49 Snug fit in the My.Size precision range.	49	170	latex	snug, custom-fit

Standard (53-56 mm)

Brand & Name	Width (mm)	Length (mm)	Material	Tags
Durex Feel Thin Classic UK market default. Thinner than Extra Safe.	56	180	latex	thin, standard
Durex Featherlite Ultra Thinnest Durex latex; 30% thinner than Classic.	56	180	latex	thin, standard
Durex Extra Safe Thicker latex for anal play or peace of mind.	56	180	latex	extra-safe, standard
Durex Mutual Climax Ribbed and dotted with benzocaine to delay climax.	56	180	latex	ribbed, standard
Durex Pleasure Me Ribbed and dotted, no numbing agent.	56	180	latex	ribbed, standard
Durex Real Feel Polyisoprene; latex-allergy safe; softer skin-feel.	56	195	polyisoprene	latex-free, thin, standard
Mates Skyn Original Polyisoprene; popular latex-free choice.	56	180	polyisoprene	latex-free, thin, standard
Mates Natural Budget Mates default; widely stocked.	54	185	latex	standard
Pasante Regular Reliable mid-range; NHS clinic standard.	54	190	latex	standard
EXS Regular Vegan latex; affordable mainstream.	53	180	latex	standard, vegan
EXS Air Thin Ultra-thin (40 micron) vegan latex.	53	180	latex	thin, vegan, standard
Skins Natural Vegan, no spermicide, low-odour latex.	54	180	latex	vegan, standard
My.Size 53 Precision-sized standard; honest sizing.	53	180	latex	custom-fit, standard

Large (57-60 mm)

Brand & Name	Width (mm)	Length (mm)	Material	Tags
Durex Comfort XL Durex's wider variant; not as wide as Trojan Magnum.	57	205	latex	large
Trojan Magnum The original "large" condom. American import.	60	205	latex	large, iconic
Pasante King Size UK-clinic's "Magnum equivalent" at lower price.	60	205	latex	large
Mates Skyn Large Polyisoprene Magnum equivalent; latex-free.	64	200	polyisoprene	large, latex-free
EXS Magnum Large Vegan magnum-fit at budget price.	60	205	latex	large, vegan
My.Size 57 Half-step between standard and Magnum.	57	193	latex	large, custom-fit
My.Size 60 Precision-sized Magnum-equivalent.	60	193	latex	large, custom-fit
Durex Avanti Ultima Polyurethane; latex-free and oil-lube safe.	64	210	polyurethane	large, latex-free, polyurethane

XL (61-65 mm)

Brand & Name	Width (mm)	Length (mm)	Material	Tags
Trojan Magnum XL The largest mainstream condom in UK retail.	65	215	latex	xl
My.Size 64 Wide and long; specialist sizing.	64	223	latex	xl, custom-fit

XXL (>65 mm)

Brand & Name	Width (mm)	Length (mm)	Material	Tags
My.Size 69 Largest condom available in the UK.	69	223	latex	xxl, custom-fit

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Frequently asked

How do I measure my erect girth correctly?: When fully erect, wrap a soft fabric tape (or a strip of paper, then measure against a ruler) around the thickest part of the shaft, usually mid-shaft. Pull the tape snug but not tight. Record the circumference in centimetres. The average UK adult erect girth is roughly 11.7 cm (Veale et al. 2015, n=15,521).
What is nominal width and why does it matter?: Nominal width is the width of a condom laid flat, which equals half its inside circumference. To match yourself: divide your erect girth in millimetres by two. If your girth is 12 cm (120 mm), your ideal nominal width is 60 mm. A correctly-fitting condom feels snug but not constrictive, with about 1 cm of room at the tip for the reservoir.
What happens if a condom is too tight or too loose?: Too tight increases breakage risk and discomfort, the latex is stretched past its design tolerance. Too loose increases slippage risk, which defeats the contraceptive and STI-prevention purpose. Aim for nominal width within ±2 mm of your calculated ideal; many manufacturers list this on the box in fine print.
I have a latex allergy. What are my options?: Polyisoprene (Mates Skyn, Durex Real Feel) and polyurethane (Durex Avanti) are the two non-latex condom materials available in the UK. Polyisoprene feels closer to latex; polyurethane is thinner, transmits heat better, and is the only condom material that tolerates oil-based lubricants. Lambskin is also non-latex but does not protect against STIs.
Are larger condoms always better if I am between sizes?: When between sizes, size up rather than down. Slippage from a slightly-loose condom is preventable with correct application; breakage from a too-tight condom rarely is. Test brands until you find the one that stays put without pinching.
Do thinner condoms break more easily?: No. WHO standards require all condoms sold in the UK to pass the same air-burst and tensile tests regardless of wall thickness. "Thin" or "ultra-thin" refers to latex wall thickness only (typically 40-60 microns vs 70-80 for "extra safe"); the breakage rate is statistically identical when used correctly.

Sources: Veale, D. et al. (2015). Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15,521 men. BJU International 115(6). WHO/UNFPA (2013). Male Latex Condom Specification, Prequalification and Guidelines for Procurement. Manufacturer technical data sheets for Durex, Mates, Pasante, Trojan, EXS, My.Size and Skins.