IT HAPENING EVEN IF I MAKE IT AS PDF,PHOTOSHOP
Could you please post screenshots?
What is »send to Photoshop« supposed to describe – copy/paste, place, import, …?
In case you place the ai/pdf in Photoshop what are the receiving file’s dimensions and resolution and is Photoshop > Preferences > General > Resize Image During Place checked?
Adding to what @c.pfaffenbichler said, set both images to pixels, then compare the sizes.
One thing I do if it "changes size" is:
Issue happens even with simple colored square ,I drag w 20x20 ai file in same size and ppi to photoshop file size changes 18.28x20. Same with pdf files .
Please post the requested screenshots already.
The screenshot indicates multiple transformations – what about them?
Is View > Pixel Aspect Ratio set to »Square«?