I already wrote in Adobe forum about this issue (https://forums.adobe.com/message/8339546#8339546) and tried all suggestions to solve this problem, but still nothing… I will try to explain my problem as clearly as possible here.

I’m using Mac and newest Illustrator CC version (19.2.0).

So the problem is that when I fill an object with a Shape Builder Tool/Paint Bucket Tool that object dimensions always changes. You can see an example in a picture (it's just an example, I don't use shape builder for simple objects like this circle, but for more complicated objects it's very useful). I created 35x35mm circle and used Shape Builder Tool 3 times in a row and each time I got diffrent results.

Does anyone knows how to solve this problem? This is very important to me, because I just can't work like this.

It would be very helpful to get an answer. Thanks.

enter image description here

  • The problem is a lot harder to reproduce when using inches. Sadly it seems to be some kind of rounding error. There are many small rounding errors when working with mm in Illustrator. I prefer using InDesign whenever I can.
    – Wolff
    Commented Apr 25, 2017 at 20:17

1 Answer 1


All right, when creating a shape in Illustrator with exact dimensions everything is OK. Once a stroke is added, it can affect the object's total dimension depending on the stroke's parameters:

enter image description here

  1. 35x35mm circle filled without a stroke
  2. 35x35mm circle with a 0.5mm stroke aligned to inside, no fill.
  3. 35x35mm circle with a 0.5mm stroke aligned to center, no fill.
  4. 35x35mm circle with a 0.5mm stroke aligned to outside, no fill.

Now when these objects are expanded or edited with live painting / shape shifter, the total dimensions will be:

  1. 35 x 35 mm
  2. 35 x 35 mm
  3. 35.5 x 35.5 mm
  4. 36 x 36 mm

In conclusion, if you want the total dimension to remain intact, use strokes that are aligned to the inside.

  • 1
    I've just done the same thing. This is that I get: 1. 34,999 x 35,003 mm 2. 34,999 x 35,003 mm 3. 34,999 x 35,003 mm 4. 34,999 x 35,003 mm No matter what stroke posizion I choose (or completely without stroke) the results are always the same. Also they are not 35x35 mm and different than yours.
    – iwy9dQxZQD
    Commented Jan 7, 2016 at 16:34

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