Chastity Cage
Fit Check

Why Fit Matters More Than Reviews

Most chastity cage reviews focus on build quality, materials, and aesthetics. What they don't cover: whether a specific cage fits your specific body. A cage rated 5 stars by someone with a 2.5" flaccid length is actively dangerous for someone at 1.5" — and vice versa.

Cage length should be 0.25–0.5" shorter than your flaccid measurement. Inner diameter should match your circumference divided by π. Ring size needs to be within 2–3mm of your base diameter. All three need to be right simultaneously. This tool checks all three against actual product specs.

How the Chastity Cage Fit Checker Works

Paste any product URL — the tool sends it to our AI which reads the page and extracts every dimension listed: tube length, inner diameter, outer diameter, ring sizes, and any size variants. It then compares each measurement against your body dimensions.

The analysis produces a fit score from 0 to 100, a verdict category (Perfect Fit, Good Fit, Caution, or Unsafe), and a per-dimension breakdown showing exactly which measurements are compatible and which aren't. You also get specific warnings — like "ring size too small — circulation risk" — and tips on whether sizing up would resolve the issue.

If you haven't measured yet, use the Sizing Tool first. It takes 60 seconds and auto-fills your measurements here.

Which Stores Does It Support?

The tool works with any product page that lists dimensions in the HTML. This includes Amazon product listings, Etsy shop pages, and direct manufacturer sites for most major brands. It does not require a special integration — it reads the page the same way you would.

Common brands and sites that work well: CB-6000 (standard and short variants), Holy Trainer v5, Bon4 silicone cages, Kink3D printed cages, and most stainless steel imports sold on Amazon. Chinese wholesale sites like AliExpress work when dimensions are clearly listed in the product description.

Sites with Cloudflare protection or login walls may block extraction. When that happens, the tool switches to manual entry — you type the dimensions directly from the product page and the AI analyzes them the same way.

Popular Cages We've Analyzed: CB-6000, Holy Trainer, Bon4

CB-6000: The most-analyzed cage in our tool. Standard version is 3.25" long with a 1.375" inner diameter. The CB-6000S (short) is 2.5" long — a better fit for most users who fall in the average flaccid length range of 2.5–3.5". Comes with 5 ring sizes (1.5"–2.0"). Polycarbonate with some flex, so you can go slightly smaller on ring.

Holy Trainer v5: Bio-sourced resin with no flex — size precisely. Available in Nano (40mm), Mini (65mm), Small (90mm), and Standard (100mm) tube lengths. Ring sizes 40–54mm. The seam-free design makes hygiene easier. High failure rate from incorrect sizing — use this tool before ordering.

Bon4 Silicone: Highly flexible — you can go 0.1–0.2" shorter than your flaccid measurement. Available in sizes from S to XL with ring sizes 40–55mm. Best for first-time wearers or anyone prioritizing comfort over security.

How to Read Your Fit Score

The fit score is a composite number from 0 to 100 based on how closely the cage dimensions match your ideal measurements, weighted by safety priority (ring size counts most heavily).

• 85–100Perfect Fit — all dimensions within ideal tolerance. Safe to buy.
• 65–84Good Fit — minor compromises on one dimension. Generally safe, may need break-in.
• 40–64Caution — one or more dimensions off enough to cause discomfort over time.
• 0–39Unsafe — significant mismatch. Do not purchase without addressing flagged dimensions.

A high score on tube length but a low ring score is still dangerous. Read the per-dimension breakdown, not just the overall number.

What If the Site Blocks Extraction?

Some retailers use anti-bot protection that prevents automated page reading. When this happens, you'll see a "Manual Entry" option. Open the product page yourself, find the dimensions section, and type in: tube length, inner diameter, and available ring sizes.

The AI analysis runs identically whether data came from URL extraction or manual entry. The only difference is you copy the numbers yourself rather than the tool reading them. This adds about 60 seconds to the process.

Tip: product dimensions are usually listed in a "Specifications" or "Product Details" section. On Amazon, scroll down to the technical details table. On Etsy, check the item description. On manufacturer sites, look for a size guide or specifications tab.