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 Sony a5000 and Samsung NX300M side-by-side from the front, back and top in their relative dimensions. Sony a5000 has external dimensions of 110 x 63 x 36 mm (4.33 x 2.48 x 1.42″) and weighs 269 g (0.59 lb / 9.49 oz) (including batteries). Samsung NX300M has external dimensions of 122 x 64 x 41 mm (4.8 x 2.52 x 1.61″) and weighs 331 g (0.73 lb / 11.68 oz) (including batteries).
Below you can see the front-view size comparison of the Sony a5000 and the Samsung NX300M. Sony a5000 is clearly the smaller of the two cameras. Its body is 12mm narrower, 1mm shorter and 5mm thinner than Samsung NX300M.
Now lets look at the top view comparison of Sony a5000 and Samsung NX300M.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony a5000 is significantly lighter (62g ) than the Samsung NX300M which may become a big advantage especially on long walking trips.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since both Sony a5000 and Samsung NX300M have the same APS-C sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Weather Sealing
Unfortunately neither the Sony Alpha a5000 nor Samsung NX300M 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Samsung NX300M's 3.30" LCD screen is slightly larger than Sony a5000's 3 screen.