# Clearance for for 3D printing

**URL:** https://discourse.shapr3d.com/t/clearance-for-for-3d-printing/23514
**Category:** Modeling Questions
**Created:** [January 10, 2023, 4:19pm UTC](https://discourse.shapr3d.com/t/clearance-for-for-3d-printing/23514 "2023-01-10T16:19:24Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![KPeter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/kpeter/32/7644_2.png) [@KPeter](https://discourse.shapr3d.com/u/KPeter)
#### Post date: [January 10, 2023, 4:23pm UTC](https://discourse.shapr3d.com/t/clearance-for-for-3d-printing/23514/2 "2023-01-10T16:23:43Z")

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Hi @JNel,  
The applied amount of tolerance depends on many details starting from printing technology and many other things. There was a discussion about this topic a few months ago, please check it if you have some time:

> [@Scale/size issue with printing model](https://discourse.shapr3d.com/t/scale-size-issue-with-printing-model/5680):
>
> Hi, I just tried to make a 3d print of a simple model (basically a simple ring) . I think the ring was about 50mm in Shapr3d, but when I exported it to STL (into Simplify3d), it became HUGE! like … twice as big as i expected. Am I missing something? Do I need to do something to keep the scale accurate? Thank you for any help!! MW ===== SOLUTION: [Why did my STL file change units? – Shapr3D Help Desk](https://support.shapr3d.com/hc/en-us/articles/115001796029-Why-did-my-STL-file-change-units-)

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_[View the full topic](https://discourse.shapr3d.com/t/clearance-for-for-3d-printing/23514)._