Conclusion
- All numerical and notation-based methods fail — Cup sizes (G-cup, K-cup, double D), cm measurements (120cm, 150cm), and weight syntax (1.3–2.0) all have no effect on breast size.
- Metaphors and slang cause unintended side effects —
watermelon-sizedsummons a watermelon,holsteinsummons a cow, and so on. super/strongprefix alone has no size-increasing effect — The full stack’s power comes from the total volume of size-related tokens.- Replacing with
breastsdoesn’t prevent nipple exposure — Replacingtits/boobswithbreastsstill produced nipple exposure in N=13. busty/buxometc. are limited — aroundlargelevel — Clearly weaker than confirmed effective descriptions (huge, massive, enormous, oversized).
This is the detailed article for Comprehensive Breast Size Prompt Comparison. It covers descriptions that were ineffective at increasing breast size. For effective descriptions, see this article.
Experiment conditions and base prompt: see the summary article.
Part 1: Numerical and Notation-Based Methods
Cup size notation (G-cup, K-cup, double D), cm numerical values (120cm, 150cm), and weight syntax (1.3–2.0) were tested. All had no effect.
Details → Part 1: Cup Sizes, cm Measurements, Weight Syntax
Part 2: Slang, Metaphors, and Syntax Analysis
Metaphors (hanging bombs, watermelon-sized, etc.), Japanese romaji (oppai), dairy cow expressions (holstein), individual effects of super/strong prefixes, the breasts unification test, and other limited descriptions (busty, buxom, etc.) were tested. All had no effect or very limited effect.
Details → Part 2: Slang, Metaphors, and Syntax Analysis
Full Summary
| Category | Method | Result |
|---|---|---|
| Numerical/notation | Cup sizes (G-cup, K-cup, double D) | No effect |
| Numerical/notation | cm measurements (120cm, 150cm) | No effect |
| Numerical/notation | Weight syntax (1.3–2.0) | No effect |
| Slang/metaphor | Metaphors (hanging bombs, watermelon-sized, etc.) | No effect (unintended objects appear) |
| Slang/metaphor | Slang (titty monster, gigantic jugs) | No effect to large level |
| Slang/metaphor | Japanese romaji (oppai) | No effect |
| Slang/metaphor | Dairy cow expressions (holstein) | No effect (cow appears) |
| Syntax analysis | super/strong prefix alone | No effect |
| Syntax analysis | breasts unification (replacing tits/boobs) | Doesn’t prevent nipple exposure |
| Other | busty, buxom, sagging nipples, breast expansion | Limited to large level |
Note:
watermelon-sizedcauses an actual watermelon to appear, andholsteincauses a cow to appear. None of the metaphors or slang expressions tested here produced the intended size-increase effect.
Back to summary | Effective descriptions
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