Pages won't allow image resize below a certain size

I saw a similar question answered from 2019, but the solution isn't working. I just started using Pages and imported a JPEG into a new document. It came in larger (6x6 inches) than I wanted. I clicked on the image, got the white resize handles, shift-clicked on a corner (to preserve proportions) and dragged inward until the resize "hit a wall" (at about 3x3 inches). No matter what I do, I can't resize it smaller. Taking advice from the earlier thread, in the Arrange pane, I've set Text Wrap to none. Also, I can't input any smaller size either by using the up-down arrows in the Size area, or manually inputting a number. The image is unlocked. I am stumped.

(I suppose I can experiment with making the source image itself smaller, but I'd think that kind of defeats the purpose, especially where there are many images and the resizing is different for each one.)