When communicating measurements, grading and sizes to your manufacturer you need a good measurement sheet.
You will have a thorough understanding of setting the tolerance margin of each measurement, on a measurement sheet after reading this post!
Measurements specs. – How to set the correct tolerance margin
3 Good reasons to use tolerance margins:
1. Size overlap
The production of any garment has many steps, and different people for each step. The odds of a sleeve not being a millimeter too short when it is finished in production would be close to a miracle.
The possibility for it to be 2 cm too short, or 2 cm too long exists, I hope you have a manufacturer where it is unlikely, but we are only humans, and mistakes happen.
Without tolerance margins a bigger and a smaller size tee can end up having the same sleeve length, or even the smaller size can end up with longer sleeves than the bigger size.
2. A consistent fit
Quality clothes need a consistent reliable fit.
If a customer likes a fit, she will return for it.
She will be happy to find the exact fit she is looking for.
3. Precise communication with your manufacturer
Your manufacturer likes to know what is expected to meet precise requirements.
If the manufacturer finds that the tolerance cannot be met in a specific fabric type, she will let you know.
How to set the tolerance
To set the tolerance for a measurement on a measurement specifications sheet we need to know the increase between two sizes.
Let’s take the sleeve length on a tee. The sleeve length increases the same between all sizes, (it is a regular grading).
The sleeve length increases 2,75 cm between each size
Half increase is
2,75 : 2 = 1,375
Can we use half increase ( 1,375 cm ) as tolerance margin?
Rather not, chances are the sleeves might still end up having the same lengths
64,25 – 1,375 = 62,875
61,5 + 1,375 = 62,875
The correct tolerance
Our aim is to have a longer sleeve in the bigger size and shorter sleeve in the smaller size.
So a tolerance smaller than 1,375 cm would be a correct tolerance.
Round the number down
We round 1,375 cm down to 1 cm.
This ensures the sleeves to have a correct length througout all sizes, now we have set the correct tolerance.
I would LOVE to hear some tips from you, how to handle tolerance margins. Comment below.
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