How do I turn a customer’s reference photo into measurable specs?

925 sterling silver jewellery, set with lab grown diamonds and made in our own Shenzhen workshop.

Posted on October 29, 2026by test111

Talk · Sourcing & Ordering (B2B)

QThe questionEditorial scenario written by the ZKZ team. Not a customer post.

A designer has a photo that a customer wants copied as a silver ring and needs to turn it into specifications a factory can quote and make.

ZKZ Editorial TeamMain answer · Product & gemmology desk

A photo shows the look but not the numbers. Work out proportions, estimate sizes from known objects or the stone, ask for extra views and confirm everything with a drawing or a sample before production.

Gather information

Our advice Ask the customer for several views and, if possible, a size reference such as a ring worn on a finger, a ruler or a coin beside it.

Estimate dimensions

Find an element you can measure, such as a stone size or a known ring size.
Use proportions from the photo to estimate band width, head height and diameter.
Compare with similar existing items.

Specify the details

Metal and finish: sterling silver and plating or polish
Stones: shape, size, count and quality
Setting style: prong, bezel, pavé
Profile: flat, domed or comfort fit
Size range: the sizes you will make

It depends Photographs can be misleading because of angles and lenses. Treat estimates as a starting point.

Check with the factory

Our advice Ask the factory for a CAD drawing or 3D render based on your specification, and check the dimensions before they make a sample.

Confirm with a sample

Compare the sample to the photo
Adjust the specification
Approve before production

Respect design rights

Copying another designer's work may raise legal issues
Use reference photos as inspiration unless you have permission

A worked example

Our advice Suppose a photo shows a ring with a round stone. If you know the stone is a particular size, you can compare the band width to the stone. If the band looks half the width of the stone, you can estimate it. Then ask the factory for a render and adjust until it looks like the photo.

Our advice Ask the customer for a size cue in the picture, such as a hand or a coin, and mark the dimensions you decide on top of the image. Send it back to the customer for approval before it goes to the factory.

Uncertain We cannot guarantee that estimated dimensions are exact. Always approve a sample.

Sources

No external standard governs this question, so this answer is editorial advice from the ZKZ team and is labelled that way.

Fact = stated by the cited source. Our advice = editorial recommendation. Uncertain / it depends = limits of what can be said in general.

Other perspectives from the ZKZ team

SOZKZ Editorial TeamSourcing & buying perspective

Give the factory several views and a size reference. One angle is rarely enough.

WSZKZ Editorial TeamWorkshop perspective

Ask for a CAD render of your specification. It catches misreadings of the photo before a sample is cast.

SEZKZ Editorial TeamSelection perspective

Treat the photo as a reference, not a template. Copying a protected design can create legal problems.

Have a different question? Ask our team, or browse more answers in Talk.

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