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 SX620 HS and Canon SX720 HS side-by-side from the front, back and top in their relative dimensions. Canon SX620 HS has external dimensions of 97 x 57 x 28 mm (3.81 x 2.24 x 1.1″) and weighs 182 g (0.40 lb / 6.42 oz) (including batteries). Canon SX720 HS has external dimensions of 110 x 64 x 36 mm (4.33 x 2.52 x 1.42″) and weighs 270 g (0.60 lb / 9.52 oz) (including batteries).
Below you can see the front view size comparison of Canon SX620 HS and Canon SX720 HS. Canon SX620 HS is clearly the smaller of the two cameras. Its body is 13mm narrower, 7mm shorter and 8mm thinner than Canon SX720 HS.
Here is the back view size comparison of Canon SX620 HS and Canon SX720 HS.
Now lets look at the top view comparison of Canon SX620 HS and Canon SX720 HS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon SX620 HS is significantly lighter (88g ) than the Canon SX720 HS which may become a big advantage especially on long walking trips.
Unfortunately neither Canon PowerShot SX620 HS nor Canon PowerShot SX720 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 SX620 HS and Canon SX720 HS's LCD screens has the same diagonal size of 3.00".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.