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 SX500 IS and Canon SX510 HS side-by-side from the front, back and top in their relative dimensions. Canon SX500 IS has external dimensions of 104 x 70 x 80 mm (4.09 x 2.76 x 3.15″) and weighs 341 g (0.75 lb / 12.03 oz) (including batteries). Canon SX510 HS has external dimensions of 104 x 70 x 80 mm (4.09 x 2.76 x 3.15″) and weighs 349 g (0.77 lb / 12.31 oz) (including batteries).
Below you can see the front view size comparison of Canon SX500 IS and Canon SX510 HS. In this case, we can see that Canon SX500 IS and Canon SX510 HS have the exact same height, width and thickness.
Now lets look at the top view comparison of Canon SX500 IS and Canon SX510 HS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon SX500 IS is 8g lighter than the Canon SX510 HS but we don't think this will make a significant difference.
Unfortunately neither Canon PowerShot SX500 IS nor Canon PowerShot SX510 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 SX500 IS and Canon SX510 HS's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.