Hi Alex ,

You can set CuteEditor image size upload limitation by using the MaxImageSize property.

MaxImageSize  specifies the max size in Kbytes of the image files that the user has access to upload.

For example, if you want to set the image size upload limitation is 200k (by default 100k), you can using the following code:

<CE:Editor id="Editor1" MaxImageSize=200 runat="server" ></CE:Editor>