--- product_id: 291732091 title: "Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician" brand: "medarchitect" price: "¥17721" currency: JPY in_stock: true reviews_count: 5 url: https://www.desertcart.jp/products/291732091-wooden-prader-orchidometer-prader-balls-endocrine-rosary-for-measuring-testis store_origin: JP region: Japan --- # Color-coded Tanner staging 12 precision-sized beads Durable high-quality beech wood Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician **Brand:** medarchitect **Price:** ¥17721 **Availability:** ✅ In Stock ## Summary > 🩺 Measure with confidence, diagnose with clarity — the ultimate endocrine rosary for pros! ## Quick Answers - **What is this?** Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician by medarchitect - **How much does it cost?** ¥17721 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/291732091-wooden-prader-orchidometer-prader-balls-endocrine-rosary-for-measuring-testis) ## Best For - medarchitect enthusiasts ## Why This Product - Trusted medarchitect brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Lifetime Durability:** Crafted from premium beech wood that resists warping and shrinkage over years of use. - • **Portable & Protected:** Includes a compact carrying pouch and sturdy string for easy, hygienic transport. - • **Clinician-Preferred Design:** Alternative bead perforation options for personalized handling comfort. - • **Visual Tanner Stage Guidance:** Color-coded beads streamline training and enhance diagnostic confidence. - • **Precision Measurement at a Glance:** 12 distinct beads calibrated to exact testicular volumes for clinical accuracy. ## Overview The Wooden Prader Orchidometer is a professional-grade medical tool featuring 12 color-coded, numbered beads made from durable beech wood. Designed for precise testicular volume measurement aligned with Tanner staging, it supports endocrinologists and pediatricians in clinical assessments. Its portable design includes a protective pouch and customizable bead orientation, ensuring longevity and ease of use throughout a medical career. ## Description ► WHAT IS THE PRADER ORCHIDOMETER Prader Orchidometer is a medical instrument that can be used to accurately measure volume and determine the size of the testicle. The cutout sizes are compared with the testicle of the patient using the volume that matches most closely in size. In the absence of varicoceles, the right and left testes are approximately equal in size. Pre-pubertal sizes are 1-3 ml in yellow, pubertal sizes are considered 4 ml in orange and up and adult sizes are 12-25 ml in red. Doctors sometimes informally refer to them as "Prader's balls", "the medical worry beads", or the "endocrine rosary." ► WHY DO WE NEED AN ORCHIDOMETER TO MEASURE To provide a patient with a symmetrical, natural appearance in the scrotum, it is important to closely match the size of the existing testes. This can be accomplished by determining the size of the existing testes by using an Orchidometer. The Orchidometer is also an important tool for endocrinologist and pediatrician. ► PRADER ORCHIDOMETER USER’S INSTRUCTION Gently pull the scrotal tissue taut around the existing testes. Place the Prader Orchidometer over the testes to assess the size that most closely resembles the current testicular size. Pre-prepubertal is defined by Tanner Staging as a testicular volume less than 1.5 ml, however 4 ml is considered to be a clinical marker of the start of puberty in boys. ## Features - The cutout sizes of the Prader Orchidometer are compared with the testicle of the patient using the volume that matches most closely in size. - The Prader Orchidometer consists of 12 pieces of beads with number. Color coded based upon Tanner staging to assist those clinicians who are in training. The number is clearly visible and organize significantly according to the different stages of growth. - The Prader Orchidometer is made by high quality beech. It won’t be shrunk and twisted. It can last for your entire career. - The “Endocrine Rosary” will come with a small carrying pouch for protection & storage. The “Endocrine Rosary” string on a sturdy string for easy sliding. - We provide alternative beads perforating direction to choose. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B08HCVV67H | | Country Of Origin | China | | Guaranteed Software Updates Until | unknown | | Is Discontinued By Manufacturer | No | | Manufacturer | Medarchitect | | Manufacturer Reference | UL162 | | Package Dimensions | 12 x 8.7 x 5.6 cm; 105 g | ## Images ![Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician - Image 1](https://m.media-amazon.com/images/I/61lqBi7aRPL.jpg) ![Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician - Image 2](https://m.media-amazon.com/images/I/61bIHDf0ujL.jpg) ![Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician - Image 3](https://m.media-amazon.com/images/I/51w4P4xxBlL.jpg) ![Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician - Image 4](https://m.media-amazon.com/images/I/31aYrv4v0aL.jpg) ![Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital, Best Gift for Endocrinologist and Pediatrician - Image 5](https://m.media-amazon.com/images/I/61BG0BTYBxS.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Doctor *by on Reviewed in the United States 2 March 2026* Calidad ### ⭐⭐⭐⭐⭐ Muy feliz con la calidad y el acabado *by on Reviewed in the United States 27 September 2025* Buen producto funcional justo lo que necesitaba para la consulta ### ⭐⭐⭐⭐⭐ Useful size reference tool *by on Reviewed in the United States 3 September 2026* Medarchitect Wooden Prader Orchidometer | 12 numbered, color-coded beads; beech construction; sliding string and protective storage pouchThis is a wooden Prader orchidometer used as a medical teaching and measurement aid. It consists of 12 smooth beechwood beads in progressively larger sizes, each with a clearly printed number and colour coding for quick identification. The beads come threaded on a cord and the set includes a fabric storage pouch for protection during transport or storage between uses.The bead sizes seem appropriate and the printed numbers are easy to read. The colour coding makes it easy to find the correct section at a glance instead of having to read every bead individually. Having a physical model is a much more effective tool for learning than looking at diagrams or photos, especially when teaching. The wood has a very smooth finish with no splinters or rough spots, and it's easy enough to wipe clean. the included pouch is a nice addition that should help keep everything protected between lessons or while travelling.The only thing that stands out is the cord. It doesn't feel as durable as a wire would, although for the intended use I don't think it's likely to be a problem. The beads slide well and the cord seems appropriately durable for a teaching tool, but I do think a wire would inspire a little more confidence over the long term.Overall, this is a well-made teaching aid that is effective, easy to use and nicely finished. The smooth wood, clear numbering and colour coding make it practical in real use, and the storage pouch is a worthwhile inclusion. At $24 this is a good value for the money. ## Frequently Bought Together - Medarchitect Wooden Prader Orchidometer, Prader Balls, Endocrine Rosary for Measuring Testis Scale in Clinic/Hospital for Endocrinologist and Pediatrician - Baseline 12-1099 Scoliosis Portable Medical Evaluation, Adults or Children --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/291732091-wooden-prader-orchidometer-prader-balls-endocrine-rosary-for-measuring-testis](https://www.desertcart.jp/products/291732091-wooden-prader-orchidometer-prader-balls-endocrine-rosary-for-measuring-testis) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-22*