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 Canon SX30 IS and Canon ELPH 300 HS side-by-side from the front, back and top in their relative dimensions. Canon SX30 IS has external dimensions of 123 x 92 x 108 mm (4.84 x 3.62 x 4.25″) and weighs 601 g (1.32 lb / 21.20 oz) (including batteries). Canon ELPH 300 HS has external dimensions of 92 x 56 x 20 mm (3.62 x 2.2 x 0.79″) and weighs 141 g (0.31 lb / 4.97 oz) (including batteries).
Below you can see the front view size comparison of Canon SX30 IS and Canon ELPH 300 HS. Canon ELPH 300 HS is clearly the smaller of the two cameras. Its body is 31mm narrower, 36mm shorter and 88mm thinner than Canon SX30 IS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 300 HS is significantly lighter (460g ) than the Canon SX30 IS which may become a big advantage especially on long walking trips.
Unfortunately neither Canon PowerShot SX30 IS nor Canon ELPH 300 HS (IXUS 220 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 Bridge Cameras with Weather Sealing Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Canon SX30 IS and Canon ELPH 300 HS's LCD screens has the same diagonal size of 2.7".
On the other hand, Canon SX30 IS sports a Fully Articulated screen
which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over the head levels, and especially very useful for shooting selfies and video. Canon ELPH 300 HS's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to SX30 IS.