Cut and Paste reduces object size

[liandal43549818]

When I select using the lasso or other tools, cut and paste, the new placement is a few pixels smaller than the original. For example, if I cut an object from the background to separate it for a different layer, and then paste it back in the original space, it's a few pixels smaller than the original selection.

It never fills in the exact space What can I do to make sure that it is exactly the same size?

I'm on a Mac up to date, and PS 2020. 

[JJMack]

Place may resize image files creating smart object layers. Copy and Paste does not.  What you see as size change is more likely you are copy from a small canvas  and pasting into a large canvas.  Your  small canvas is being displayed zoomed 100% and your large canvas is being displayed  zoomed to a lower percent so the images fits on your display.  The object is the same size in both documents. Make sure you are viewing both documents at the same zoom %.

[liandal43549818]

I don't think that's what's going on because I am pasting back into the original canvas- but just on a separate layer. So when I put the new layer over the space where the cut was made, the copied image superimposed on the old layer is smaller by a few pixels that the one I copied.

For instance, I do that when I want to put a drop shadow around something like a leaf. The new layer is probably 2 pixels smaller all around. I hope that makes it more understandable.

[JJMack]

The original canvas is being display the same zoom percentage in the  same window. Not in different window at a different zoom percentage.  View all the canvas at the same 100%  zoom level to see the object's  actual pixels it will be the same size  in the both documents.

Copy copies the document actual pixels to the clipboard even if you are viewing at zoom levels not 100%.

Paste does not resample the clipboard.     Zoom scales what is being displayed. Only at 100% Zoom are you viewing the actual document's pixels.  At any other zoom level  you see a scaled version of the image.  You are not viewing the actual image. 

[Kevin Stohlmeyer]

Have you tried zooming into the Pixel grid to make sure you are selecting the exact edge you want to copy/paste?

Having it even 1 px inset will cause issues.

Example:

Looks good right?

Not so much...

Zooming into the Pixel Grid shows I was 1 px off on both edges.

[lesley22863348a0w6]

make sure the dimensions of the canvas is in pixels. I was using 1290 x 720 cm instead of 1280 x 720 pixels. 

[Dondie32472575jdkl]

was having the same problem and it took me a while to realize that the source file is at 150 resolution pixels/inch and my Smart Object is at 150 pixels/centimeter

[Trevor.Dennis]

 @Dondie32472575jdkl

Try not to thing in terms of pixels-per-inch/centimetre.  Just think about pixels.  If the source object is 200 pixels square, and the target document is 2000 pixels square, then the source object will fill one tenth the width and height of the target document.

If you search for objects on Google Images, click to select the image you want, and hover over so you see its pixel size.

 

Better still, use the Tools drop-down and and select Large, even if you don't need a huge object to fill the space.  It makes for cleaner removal of background and you can make it a Smart Object so you can resize it multiple times.

I know you already knew all this stuff, so just a reminder.

If you do a lot of Photoshop composites, add Yandex to your browser toolbar.  It has different results to Google Images, and you don't need to keep setting Size to Large every time you change the search parameters.

https://yandex.com/images/

Also add Google Advanced Image Search to your bookmarks at least.  You can search dor different sizes of an image, and lots more.

https://www.google.com/advanced_image_search

I'm tempted to suggest using Firefly as an alternative to searching for stock images.  It often works for me, but with us needing to worry about Generative Credits from November, we'll be needing to think more carefull about using it.

https://helpx.adobe.com/firefly/using/generative-credits-faq.html

[jcstudios]

I have this same issue and know exactly what you are talking about.
Quick run down of how to recreate the issue:
First, I will select something from my photo using the lasso object tool or use select subject menu item from the selection drop down menu. Second, I'll cut that object out of the image (ctrl-x). Third, I'll insert some stylized text into a new layer that I want the original object that I just cut out in the first step to partially paste over the new text layer that I just added.

(In the steps above I haven't changed the deminsions of the image or resized anything.)
Last, I literlly just paste the original object (typically the subject) that I cut out in the first step back into the same image as a new layer so that it now covers the text object that I inserted in step two. 

The workflow above somehow creates a tiny 1-2 pixel gap around the entire subject that we just pasted back into the original image that it came from in step one.

I don't know how to fix it. I hope that this explains the problem and if this isn't what you're dealing with please let me know but if it is and you figured out what is going on I'd love to know how you resolved this if you know the fix... Thank you!

[mglush]

Hi! Did you check to see if you have a feather applied to your "cut-out" image? 

Before making the selection with the lasso tool, check in your Options bar and make sure that Feather is set to 0. 

Let us know if that fixes it?

Michelle