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 Canon ELPH 140 IS and Panasonic FP3 side-by-side from the front, back and top in their relative dimensions. Canon ELPH 140 IS has external dimensions of 95 x 54 x 22 mm (3.74 x 2.13 x 0.87″) and weighs 127 g (0.28 lb / 4.48 oz) (including batteries). Panasonic FP3 has external dimensions of 99 x 59 x 19 mm (3.9 x 2.32 x 0.75″) and weighs 155 g (0.34 lb / 5.47 oz) (including batteries).
Below you can see the front-view size comparison of the Canon ELPH 140 IS and the Panasonic FP3. Canon ELPH 140 IS is 4mm narrower and 5mm shorter than Panasonic FP3 but it is also 3mm thicker.
Here is the back view size comparison of the Canon ELPH 140 IS and Panasonic FP3.
Now lets look at the top view comparison of Canon ELPH 140 IS and Panasonic FP3.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 140 IS is significantly lighter (28g ) than the Panasonic FP3 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon PowerShot ELPH 140 IS (IXUS 150) nor Panasonic Lumix DMC-FP3 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
Panasonic FP3's 3.00" LCD screen is slightly larger than Canon ELPH 140 IS's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.