The word "smallish" means something that is somewhat small, but not very tiny. It is a word used to describe things that are bigger than small but still smaller compared to the average size. Full definition
«In traditional Victorian style, the interior was a series of smallish rooms with high ceilings and had no relevance to the way we wanted to live,» she says. (idealhome.co.uk)
I delved a little deeper and discovered that it has a 3500 lb towing capacity, pretty much unheard of for smallish crossover SUVs. (autolist.com)
In the back, the Civic can seat three people in relative comfort, but it's not the airiest feeling of interiors, with smallish rear windows and an excessive use of black with no offsetting tones. (drivemag.com)