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 Samsung TL225 and Sony NEX-3N side-by-side from the front, back and top in their relative dimensions. Samsung TL225 has external dimensions of 100 x 60 x 19 mm (3.94 x 2.36 x 0.75″) and weighs 187 g (0.41 lb / 6.60 oz) (including batteries). Sony NEX-3N has external dimensions of 110 x 62 x 35 mm (4.33 x 2.44 x 1.38″) and weighs 269 g (0.59 lb / 9.49 oz) (including batteries).
Below you can see the front view size comparison of Samsung TL225 and Sony NEX-3N. Samsung TL225 is clearly the smaller of the two cameras. Its body is 10mm narrower, 2mm shorter and 16mm thinner than Sony NEX-3N. As you can tell, actually this is not a fair size comparison since Samsung TL225 has a built-in lens but Sony NEX-3N doesn't. Once you put a lens on NEX-3N, its thickness will increase significantly.
Here is the back view size comparison of Samsung TL225 and Sony NEX-3N.
Now lets look at the top view comparison of Samsung TL225 and Sony NEX-3N.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Samsung TL225 is significantly lighter (82g ) than the Sony NEX-3N which may become a big advantage especially on long walking trips.
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 NEX-3N, the total kit will weigh much higher.
Unfortunately neither Samsung TL225 (ST550) nor Sony Alpha NEX-3N 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
Samsung TL225's 3.5" LCD screen is slightly larger than Sony NEX-3N's 3" screen.
On the other hand, Sony NEX-3N LCD screen has a Tilting feature
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels. On the other hand, Samsung TL225 has a fixed type screen which provides less flexibility in shooting positions compared to NEX-3N.