How to position a part relative to another parts size/length?

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#1

I tried searching on google to no avail.

Help much appreciated!

#2

You have not provided enough information on what you actually want to achieve.
Can you please provide further information? If needed, you can even do a sketch in mspaint.

#3

so i want to make a viewport particle emitter, but first i need to get the length of a part and position another part based on that length (hopefully that made sense.)

#4

In what way should it be positioned relative to the other part? (a picture/drawing may help)

#5

RobloxScreenShot20230919_031322194
RobloxScreenShot20230919_0313221941336×600 325 KB

RobloxScreenShot20230919_031311385
RobloxScreenShot20230919_0313113851336×600 328 KB

Like this, i can get it like picture 1, but not like picture 2 (and sometimes picture 1 dosen’t work.)