A few customers who reviewed the product considered that it was compact. Cnet.co.uk mentioned on expert website CNET.co.uk “You'll understand why we were so excited to get our hands on Nikon's £250 Coolpix S100 compact camera”. Cnet.co.uk also wrote “The Nikon Coolpix S100's performance doesn't quite live up to its looks, and, while this compact camera is packed with features, its price is too high for our liking”. Digitalversus.com mentioned “The S100 seems closely related to the AW100 waterproof compact” but despite that scored it 40 out of 100.
One Nikon Coolpix S100 owner who reviewed the Nikon Coolpix S100 wrote that it was thin. Digicambuyer.co.uk rated the product 4 stars and wrote on Digicam Buyer.co.uk five years ago “Thin, minimalistic and stylish” in their review.
One customer wrote in their reviews that it was thick. Expert review site Cameras.co.uk said four years ago “At around 18mm wide it will fit easily into more or less any pocket”.