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 Canon ELPH 100 HS 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). Canon ELPH 100 HS has external dimensions of 93 x 56 x 20 mm (3.66 x 2.2 x 0.79″) and weighs 140 g (0.31 lb / 4.94 oz) (including batteries).
Below you can see the front view size comparison of Samsung TL225 and Canon ELPH 100 HS. Canon ELPH 100 HS is 7mm narrower and 4mm shorter than Samsung TL225 but it is also 1mm thicker.
Here is the back view size comparison of Samsung TL225 and Canon ELPH 100 HS.
Now lets look at the top view comparison of Samsung TL225 and Canon ELPH 100 HS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 100 HS is significantly lighter (47g ) than the Samsung TL225 which may become a big advantage especially on long walking trips.
Unfortunately neither Samsung TL225 (ST550) nor Canon ELPH 100 HS (IXUS 115 HS) 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
LCD Screen Size and Features
Samsung TL225's 3.5" LCD screen is slightly larger than Canon ELPH 100 HS's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.