<p>Years ago when in the market for my tablet, I found many references (for artists) using the tablets that described how the motion of using the pen would involve the whole arm. My very slight previous attempts at art work with pencil, charcoal and so forth matched these descriptions so I took notice of these comments.<br>
I purchased a medium sized tablet, a little larger than 8x10. I found right away that the pen/tablet combination was most useful and comfortable when using the "whole arm" to maneuver, not just using the pen held and manipulated as a pencil. However, my main use of the tablet was to clean up very old slides and negatives that were damaged by dust, scratches, and fungus. So a whole lot of my actual work with the tablet was using the pen as a pencil "pointer" to jab at the little white dust spots. Very hard on the fingers when you do this for long periods. <br>
The first couple of years I swore that I should have gotten the smaller sized tablet; but now I find the medium size more comfortable. It took a long time to work in the "whole arm" movement when scrolling and so forth, but I do that now and its very natural. And the tablet size seems well matched to my images which are 3k x 4k or more (6mb up to 24mb). When zoomed in to see the detail there can be quite a lot of scrolling around. I still have to go after the dust and scratches one by one and that is still hard on the fingers; but the mouse is even harder!. So I find the tablet works really well in this particular task. For other photofinishing tasks, such as dealing with Photoshop layers, and making adjustments and so forth, I keep coming back to the mouse. I am pretty adept at mouse movements. Basically, I keep a mouse pad right on top of the tablet so I can switch back and forth pretty rapidly.<br>
Keep in mind as the tablets get larger you will run out of real estate on your desk top and it will become more unwieldy to use.<br>
So if your work load is similar to mine, my recommendation would be to get a tablet with a working area not less than around 8 inches by 6 inches, but not much more than that. The actual tablet will be larger, perhaps 13 inches by 9 inches. Balance the larger work area which is good, with the larger overall tablet size which will get hard to use on your desk top.</p>