Why is my model smaller when sliced

[coyspurs54 0]

Hi everyone.

Hope someone can help with my problem. I made a dogs water bowl to go into a corner in tinkercad, no problems done it many times. Export to cura all is well as in photo, slice it, have a look in preview and the bowl has shruk but the grey shape is correct size. Can only print the red preview size not the size of the grey outline. Cannot find anywhere ( Or I am wording it wrong) that can help. 

Many  thanks for reading, hope you have an answer

[ahoeben 1,968]

You may want to check the "Scaling factor shrinkage compensation" setting.

[HundredAcreWeeds 1]

also check "Horizontal Expansion" setting (make it 0 if not already)