Small enough to care and big enough to do the job.
"Keep testimonials short, to the point, directly related to the rest of the page content and always attributable to someone."
- John Van Doe
Van Doeco Travels
Remind me why I should get in touch as soon as possible
0800 123 456
Use small amounts of text to give the images context
Your gallery pages should be easy for me to understand. Images on these pages should be related to each other so I don't have to figure out what the images are trying to say.
To show images which don't relate to each other use a heading and copy to describe them.