One of the downsides of shopping online is that it’s hard to know product size dimensions. Some retailers place a coin next to product image so we can visualize relative size, but even that approach isn’t perfect.
I was looking at a Shark Mug on uncommongoods.com and noticed this curious link (red arrow in screenshot below)—
On click this appeared on screen—
Then I just selected my screen size and was shown a new product image where mug was displayed in actual size on screen (the size I’d see if I was looking at mug in person). Very cool. This service is provided by a third party tool called lifesizer.com.