# Model smaller than cad

**URL:** <https://discourse.shapr3d.com/t/model-smaller-than-cad/9530>\
**Category:** Modeling Questions\
**Created:** [October 27, 2020, 7:48am UTC](https://discourse.shapr3d.com/t/model-smaller-than-cad/9530 "2020-10-27T07:48:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Ace250](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Ace250](https://discourse.shapr3d.com/u/Ace250)\
**Post date:** [October 27, 2020, 7:48am UTC](https://discourse.shapr3d.com/t/model-smaller-than-cad/9530/1 "2020-10-27T07:48:13Z")

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I am trying to model a simple ramp with free version. I have set the height to about 2 inches length to about 6 and width to about 3. I have the measurement setting down as inches but when I load the model up to fusion and my slicer its wayyyyyy smaller than what I modeled it.

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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:** [October 27, 2020, 8:28am UTC](https://discourse.shapr3d.com/t/model-smaller-than-cad/9530/2 "2020-10-27T08:28:39Z")

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Hi Ace250,

When you export your model as STL, there are some advanced options where you can define the _Output Format_ and the _Units_. Are these units inches too?

 ![IMG_FC8BBD202841-1](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/a9ce335b6e9bae43272a8232d561814103d7b397.jpeg)

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**Author:** ![Ace250](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Ace250](https://discourse.shapr3d.com/u/Ace250)\
**Post date:** [October 27, 2020, 2:58pm UTC](https://discourse.shapr3d.com/t/model-smaller-than-cad/9530/3 "2020-10-27T14:58:51Z")

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Hello,

Yes they are also set to inches.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [October 27, 2020, 2:59pm UTC](https://discourse.shapr3d.com/t/model-smaller-than-cad/9530/4 "2020-10-27T14:59:49Z")

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I too work in inches. When you finish your model, change units to millimeters (upper right corner) and then export as STL. Your slicer expects metric.

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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:** [October 27, 2020, 3:15pm UTC](https://discourse.shapr3d.com/t/model-smaller-than-cad/9530/5 "2020-10-27T15:15:32Z")

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Yes, this is what I was thinking about. You can easily find that out by reimporting your STL into shapr. If it has the right dimensions, you should look at the slicer’s settings.

If none of these works, upload the design please and we will find out what can be the issue