This is what I've been using since the mid to late 90's, a Bushnell Yardage Pro 400. I grabbed this pic off the net but you can see the size of this in comparison to the power strip behind it. It's easily bigger than most full size 8x40 roof prism binoculars.
Here's a sample image. Clean aiming point, a few different modes, this is all I've ever needed until now. If it would go out to 1000 meters and had a true horizontal distance function that's all I'd need going forward.