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 Nikon S9100 and Ricoh GR Digital IV side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Ricoh GR Digital IV has external dimensions of 109 x 59 x 33 mm (4.29 x 2.32 x 1.3″) and weighs 190 g (0.42 lb / 6.70 oz) (including batteries).
Below you can see the front view size comparison of Nikon S9100 and Ricoh GR Digital IV. Ricoh GR Digital IV is 3mm shorter and 2mm thinner than Nikon S9100 but it is also 4mm wider.
Here is the back view size comparison of Nikon S9100 and Ricoh GR Digital IV.
Now lets look at the top view comparison of Nikon S9100 and Ricoh GR Digital IV.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Ricoh GR Digital IV is 24g lighter than the Nikon S9100 but we don't think this will make a significant difference.
Unfortunately neither Nikon Coolpix S9100 nor Ricoh GR Digital IV 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
Nikon S9100 and Ricoh GR Digital IV'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.