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 Panasonic LX100 and Sigma DP1 Merrill side-by-side from the front, back and top in their relative dimensions. Panasonic LX100 has external dimensions of 115 x 66 x 55 mm (4.53 x 2.6 x 2.17″) and weighs 393 g (0.87 lb / 13.86 oz) (including batteries). Sigma DP1 Merrill has external dimensions of 122 x 67 x 64 mm (4.8 x 2.64 x 2.52″) and weighs 330 g (0.73 lb / 11.64 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic LX100 and the Sigma DP1 Merrill. Panasonic LX100 is clearly the smaller of the two cameras. Its body is 7mm narrower, 1mm shorter and 9mm thinner than Sigma DP1 Merrill.
Here is the back view size comparison of the Panasonic LX100 and Sigma DP1 Merrill.
Now lets look at the top view comparison of Panasonic LX100 and Sigma DP1 Merrill.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sigma DP1 Merrill is significantly lighter (63g ) than the Panasonic LX100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-LX100 nor Sigma DP1 Merrill 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 LX100's 3.00" LCD screen is slightly larger than Sigma DP1 Merrill's screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.