How does preference for penis girth versus length vary by age group?

1. What the strongest experimental data says about girth vs. length

A calibrated laboratory study using 33 tactile 3D-printed models asked 75 sexually experienced women (aged 18–65) to choose preferred erect sizes for different partner contexts and found a systematic tilt toward above-average girth with modestly above-average length for both long-term and one-time partners, and also reported that circumference (girth) was easier for women to recall than length ^{[1] [3]}.

2. What the literature provides on age-specific differences — and what it does not

Although that PLOS ONE/UCLA study included adults across a wide age span (18–65), the published report and accessible summaries do not present clear, statistically powered comparisons by decade or age cohort, so it cannot be concluded from that dataset that younger and older women differ meaningfully in their girth-versus-length priorities ^{[1] [3]}. Separate survey-type samples focused on undergraduates (younger women) have leaned heavily toward reporting that width/girth matters more than length (one small undergraduate sample found 45 of 50 undergraduates prioritized width), but these are convenience samples and cannot be generalized across ages without risk of sampling bias ^[2].

3. Contextual patterns (relationship type, short-term vs long-term) are stronger than age patterns

Across multiple reports, the clearest consistent pattern is a difference by relationship context rather than by respondent age: the 3D-model experiment found slightly larger preferred sizes for one-time partners versus long-term partners, and other reviews and surveys emphasize that women’s stated ideals depend on whether the encounter is casual or committed—an effect seen in both the controlled study and in broader summaries ^{[1] [3] [4]}. This contextual distinction appears more robust in the literature than any age gradient in preference.

4. Why age effects are plausible but under-researched (and where bias can creep in)

There are plausible reasons to expect age-related differences—changes in sexual priorities across the lifespan, shifting anatomy or partner pools, and cohort cultural norms—but available datasets either lack sample size for age-stratified analysis or are skewed toward specific demographics (e.g., California residents, mostly white or Asian in the 3D-model study), leaving conclusions about age-based variation speculative ^[1]. Commercial and clinical outlets that discuss “girth easier to improve” or trumpet large-sample percentages often mix clinical claims, self-report surveys, and marketing aims; such sources (web clinics, product blogs) can introduce implicit agendas favoring procedures or products aimed at increasing girth ^{[5] [4]}.

5. Practical interpretation and reporting caveats

The best current evidence supports that many women—across at least a wide adult age range sampled in research—place relatively more importance on girth than length, and that preferences shift by relationship context more clearly than by age; however, the literature lacks high-powered, representative age-stratified surveys and the largest measurement studies focus on anatomical averages rather than preference changes with age, so definitive claims about how exactly preference for girth versus length moves from the teens to the 60s cannot be made from available reporting ^{[1] [6] [2]}. Any summary must therefore distinguish robust, replicated findings (girth commonly rated as more important) from gaps in the record (absence of consistent, population-representative age-group comparisons).