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 Sony W830 and Canon ELPH 340 HS side-by-side from the front, back and top in their relative dimensions. Sony W830 has external dimensions of 93 x 52 x 23 mm (3.66 x 2.05 x 0.91″) and weighs 122 g (0.27 lb / 4.30 oz) (including batteries). Canon ELPH 340 HS has external dimensions of 100 x 58 x 22 mm (3.93 x 2.27 x 0.88″) and weighs 147 g (0.32 lb / 5.19 oz) (including batteries).
Below you can see the front view size comparison of Sony W830 and Canon ELPH 340 HS. Sony W830 is 7mm narrower and 6mm shorter than Canon ELPH 340 HS but it is also 1mm thicker.
Here is the back view size comparison of Sony W830 and Canon ELPH 340 HS.
Now lets look at the top view comparison of Sony W830 and Canon ELPH 340 HS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Sony W830 is significantly lighter (25g ) than the Canon ELPH 340 HS which may become a big advantage especially on long walking trips.
Unfortunately neither Sony Cyber-shot DSC-W830 nor Canon PowerShot ELPH 340 HS (IXUS 265 HS) 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
Canon ELPH 340 HS's 3" LCD screen is slightly larger than Sony W830's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.