How do I check an image's exact size in Google Slides?

Right-click the image, choose Format options, and open Size & rotation. The current width and height are shown there and can be edited directly, which is also the native way to give several images identical dimensions.

Can I resize all images at once without an add-on?

Not to a common size. Multi-selecting and dragging a handle scales everything proportionally, so differences remain. Natively you have to type the same width and height into Format options for each image, one at a time.

How do I avoid stretching photos when equalizing sizes?

Match only one dimension: same width for a column, same height for a row, and let the other dimension follow each photo's proportions. Auto Layout & Grid's apply-width and apply-height modes do exactly this in one click. For identical rectangles, crop the photos to a common ratio first.

Does copy and apply size work on shapes and text boxes?

Yes. It works on any resizable element: images, shapes, text boxes, icons. Elements that can't be resized this way (like tables) are simply skipped rather than breaking the operation.

Is Auto Layout & Grid free?

It's free to install from the Google Workspace Marketplace and every action has a free use, so you can equalize a real slide before paying anything. A one-time payment unlocks unlimited use for life, with no subscription.

How to Make All Images the Same Size in Google Slides

This comes up constantly: six product screenshots that should sit in a tidy row, a set of team photos, a strip of partner logos. Uneven sizes are what make a slide look amateur, and Slides gives you no direct "make same size" command. Here's the native routine, the trap to avoid with photos, and the fast way.

The Native Way: Format Options, One Image at a Time

Click the first image, right-click it and choose Format options (or Format → Format options).
Open the Size & rotation section.
Type your target Width and Height. With Lock aspect ratio checked, setting one dimension adjusts the other proportionally.
Repeat for every other image, typing the same numbers each time.

It works, and for two or three images it's perfectly fine. For ten, it's a chore, and one typo somewhere leaves a subtly off image you'll spot during the presentation.

Why Multi-Selecting Doesn't Do It

Selecting all the images and dragging a corner handle scales the selection: every image grows or shrinks in proportion to its current size. Big images stay bigger, small ones stay smaller. There is no native command that makes selected objects equal in size.

The Real Trap: Aspect Ratios

Forcing the same width and height onto photos of different proportions stretches them: faces widen, screenshots squash. Two honest fixes:

Match one dimension only. Give every image the same width and let heights differ (ideal for columns), or the same height for a row. This is usually what a clean layout needs.
Crop to a common ratio first. Double-click an image to enter crop mode, crop each one to roughly the same proportions, then equalize sizes.

Two Clicks with Auto Layout & Grid: Copy & Apply Size

Auto Layout & Grid adds a persistent layout panel to Google Slides. Its size tool works like a format painter, but for dimensions:

Install it from the Marketplace, then open Extensions → Auto Layout & Grid → Open panel.
Select the image whose size is right and click Copy size.
Select the images to fix (you can include the original) and apply the width, the height, or both.

The width-only and height-only modes are the aspect-ratio-safe options from above, applied in one click instead of image by image. It works on shapes, text boxes and icons too, so every card or thumbnail on the slide can match in seconds.

Verdict: native Format options is precise but linear in effort; copy & apply size is the same precision at constant effort, whatever the number of objects.

A Clean Workflow for Image-Heavy Slides

Equalize sizes (same width or height, as above).
Align and space them: see how to align and distribute objects in Google Slides.
For full galleries, skip both and use a grid directly: how to make an image grid in Google Slides (it preserves aspect ratios by design).