Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Nikon A100 and Sony WX220 side-by-side from the front, back and top in their relative dimensions. Nikon A100 has external dimensions of 95 x 59 x 20 mm (3.74 x 2.32 x 0.79″) and weighs 119 g (0.26 lb / 4.20 oz) (including batteries). Sony WX220 has external dimensions of 92 x 52 x 22 mm (3.62 x 2.05 x 0.87″) and weighs 121 g (0.27 lb / 4.27 oz) (including batteries).
Below you can see the front view size comparison of Nikon A100 and Sony WX220. Sony WX220 is 3mm narrower and 7mm shorter than Nikon A100 but it is also 2mm thicker.
Here is the back view size comparison of Nikon A100 and Sony WX220.
Now lets look at the top view comparison of Nikon A100 and Sony WX220.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon A100 is 2g lighter than the Sony WX220 but we don't think this will make a significant difference.
Unfortunately neither Nikon Coolpix A100 nor Sony Cyber-shot DSC-WX220 provides any type of weather sealing in their body, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Sony WX220's 3" LCD screen is slightly larger than Nikon A100's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.