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 Panasonic ZS7 and Panasonic GM1 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS7 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 218 g (0.48 lb / 7.69 oz) (including batteries). Panasonic GM1 has external dimensions of 99 x 55 x 30 mm (3.88 x 2.16 x 1.2″) and weighs 204 g (0.45 lb / 7.20 oz) (including batteries).
Below you can see the front view size comparison of Panasonic ZS7 and Panasonic GM1. Panasonic GM1 is clearly the smaller of the two cameras. Its body is 4mm narrower, 5mm shorter and 3mm thinner than Panasonic ZS7. As you can tell, actually this is not a fair size comparison since Panasonic ZS7 has a built-in lens but Panasonic GM1 doesn't. Once you put a lens on GM1, its thickness will increase significantly.
![Panasonic ZS7 vs Panasonic GM1 Camera Size Comparison - Front View]()
Comparison image of Panasonic ZS7 and Panasonic GM1 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Panasonic ZS7 and Panasonic GM1.
![Panasonic ZS7 vs Panasonic GM1 Camera Size Comparison - Back View]()
Comparison image of Panasonic ZS7 and Panasonic GM1 Size and Weight - Back View
Now lets look at the top view comparison of Panasonic ZS7 and Panasonic GM1.
![Panasonic ZS7 vs Panasonic GM1 Camera Size Comparison - Top View]()
Top View Comparison image of Panasonic ZS7 and Panasonic GM1 Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic GM1 is 14g lighter than the Panasonic ZS7 but we don't think this will make a significant difference.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on GM1, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither Panasonic Lumix DMC-ZS7 (Lumix DMC-TZ10) nor Panasonic Lumix DMC-GM1 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 Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS7 and Panasonic GM1'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.