can it measure the head

Yes it can measure the human head. The outer measurement range is approximately 1" (2.5 cm) minimum to 12" (30.5 cm) maximum. Many customers use it for head related measurements including drawings, pottery, sculptures, wood working, etc. Great question. Samantha Smith Jelda

What about receiving my e=book that came with the purchase?

Hi, The e-book is automatically sent to your Amazon registered email address. You may not have received it if you have turned off email notifications from Amazon in your settings. I can send it directly to you if you go to your order and contact seller. Hope this is helpful and thank you for your business. I appreciate it! Regards, Samantha Jelda

what is the smallest measurement that these calipers can measure? Thanks!

The smallest overall measurement between the two outside points is 1.125".

how thick is the metal the tool lis made from?

The metal thickness is 1 mm which has been optimized based on significant customer feedback and many trials. If material is thicker then it becomes too bulky, more difficult to use and heavy. If the material is thinner, then it is more susceptible to bending and inaccuracy. Hope this is helpful and thanks for the question. Samantha Smith Jelda

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Golden Mean Calipers with Case - Medium 6.5in (16.5 cm) | Higher Quality Curved 3 Prong Design | Great for Tattoos, Art Work & Design | Fibonacci Gauge | Golden Ratio Calipers | Gift Item

معرّف المنتج: 48122314

معاملة آمنة

التفاصيل

Brand
JELDA
Material
Stainless
Product Dimensions
6.5"L x 1"W
Range
1 inches
Measurement Accuracy
+/-0.0001

📏Precision ±0.0001in

🔩Durable stainless steel

🪵Protective wooden case

الوصف

📐 Unlock the secret code of beauty with every measurement!

CRAFTED TO LAST - Premium stainless steel construction ensures durability and timeless elegance.
GIFT READY ELEGANCE - Comes in a sleek wooden case with sponge base—an inspiring gift that sparks conversation.
PRECISION PERFECTED - Measures the Golden Ratio with ultra-fine ±0.0001 inch accuracy for flawless design.
ERGONOMIC CURVED DESIGN - Comfortable 3-prong curved calipers for effortless, precise handling every time.
VERSATILE CREATIVE TOOL - Ideal for artists, architects, tattooists, and designers tapping into nature’s perfect proportion.

The Golden Mean Calipers by JELDA International are precision-engineered stainless steel tools designed to measure the Golden Ratio (1:1.618) with ±0.0001 inch accuracy. Featuring a comfortable curved 3-prong design and a protective wooden case, these calipers are perfect for professionals and creatives in art, design, tattooing, architecture, and more. Compact, reusable, and easy to sterilize, they combine master craftsmanship with versatile functionality—making them a must-have for anyone serious about perfect proportions.

المواصفات

Brand	JELDA International
Material	Stainless Steel
Product Dimensions	6.5"L x 1"W
Range	1 inches
Measurement Accuracy	+/-0.0001 inches
Manufacturer	JELDA International
Global Trade Identification Number	00868838000339
Part Number	JGMC-1670
Item Weight	2.6 ounces
Is Discontinued By Manufacturer	No
Size	11 Inches & Above
Pattern	Curved
Item Package Quantity	1
Special Features	Golden Ratio Calipers
Batteries Included?	No
Batteries Required?	No