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 Pentax XG-1 and Panasonic FZ2500 side-by-side from the front, back and top in their relative dimensions. Pentax XG-1 has external dimensions of 119 x 89 x 98 mm (4.69 x 3.5 x 3.84″) and weighs 567 g (1.25 lb / 20.00 oz) (including batteries). Panasonic FZ2500 has external dimensions of 138 x 102 x 135 mm (5.42 x 4.01 x 5.3″) and weighs 915 g (2.02 lb / 32.28 oz) (including batteries).
Below you can see the front view size comparison of Pentax XG-1 and Panasonic FZ2500. Pentax XG-1 is clearly the smaller of the two cameras. Its body is 19mm narrower, 13mm shorter and 37mm thinner than Panasonic FZ2500.
Here is the back view size comparison of Pentax XG-1 and Panasonic FZ2500.
Now lets look at the top view comparison of Pentax XG-1 and Panasonic FZ2500.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Pentax XG-1 is significantly lighter (348g ) than the Panasonic FZ2500 which may become a big advantage especially on long walking trips.
Unfortunately neither Pentax XG-1 nor Panasonic Lumix DMC-FZ2500 (Lumix DMC-FZ2000) 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
LCD Screen Size and Features
Pentax XG-1 and Panasonic FZ2500's LCD screens has the same diagonal size of 3.00".
On the other hand, Panasonic FZ2500 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. Pentax XG-1's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to FZ2500.