Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Casio EX-Z450 and Canon ELPH 310 HS side-by-side from the front, back and top in their relative dimensions. Casio EX-Z450 has external dimensions of 81 x 56 x 21 mm (3.19 x 2.2 x 0.83″) and weighs 128 g (0.28 lb / 4.52 oz) (including batteries). Canon ELPH 310 HS has external dimensions of 96 x 57 x 22 mm (3.78 x 2.24 x 0.87″) and weighs 140 g (0.31 lb / 4.94 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-Z450 and the Canon ELPH 310 HS. Casio EX-Z450 is clearly the smaller of the two cameras. Its body is 15mm narrower, 1mm shorter and 1mm thinner than Canon ELPH 310 HS.
Here is the back view size comparison of the Casio EX-Z450 and Canon ELPH 310 HS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Casio EX-Z450 is 12g lighter than the Canon ELPH 310 HS but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Casio Exilim EX-Z450 nor Canon ELPH 310 HS (IXUS 230 HS) provides any type of weather sealing in their bodies, 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
Casio EX-Z450 and Canon ELPH 310 HS's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.