For the real PROs, let’s take this particular tip to the next level and also explain how us whackos use these very same suffixes in conjunction with gender changes in our word-formation

In English you miss the power of varying size and gender of the objects, so you resort to putting multiple words together to create a new word, as in cue-ball, manhole, sunroof, moonroof, car window…

Our approach is quite different, and i reckon it must be very tough for a foreigner… more than it is for us to understand why for the French the sand is masculine (what a disgust!!! I’ve been lying on cliffs ever since I made this discovery!)

freccia : feminine, arrow
freccette : feminine, small and plural, darts

tomba : feminine, tomb
tombino : masculine (!) and small, manhole

palla : feminine, ball
pallina : feminine and small, the dog’s ball
pallone : masculine (!) and big, the soccer ball
pallino : masculine (!) and small, cue ball or golf ball

finestra : feminine, window
finestrino : masculine (!) and small, car window
finestrone : masculine (!) and bug, something like a stained-glass window, but not actually stained

pendolo : masculine, a pendulum
pendolino : masculine and small, a (supposedly fast train for commuters

macchina : feminine, car
macchinina : feminine and small, toy car
macchinetta : feminine and small, food/drink dispenser
macchinona : feminine and big, a penis extension (a big car)
macchinone : masculine (!) and big, same as above, perhaps more emphatic

secchio : masculine, bucket
secchiello : masculine and small, toy bucket kids use to build sandcastles
secchione : masculine and big, a smart-ass grind

calza : feminine, sock
calzino : masculine (!) and small, short sock
calzone : masculine (!) and big, a trouser (a single leg) or a pizza that has been folded over before being baked
calzoni : same as above but plural, trousers, or multiple folded pizzas, of course!
calzettoni : masculine (!) small but at the same time big, plural,
mezza calzetta : feminine, “half sock”, non-vulgar expression to denote a useless person, closely related to a quite vulgar one

cazzo : masculine, vulgar but common-use expression for the male sex
cazzone : masculine and big, a jerk (of course it may also retain the literal meaning)
cazzino : masculine and small, the same as pisellino in your example above

tetto : masculine, roof
tettuccio apribile : masculine, small and that can be opened, sunroof (or a moonroof if you drive a fiat)

foglia : feminine, leaf
foglio : masculine (!), sheet
foglietto : masculine(!) and small, a note (possibly sticky)
fogliolina : feminine and small, one of those small leaves with a nice shape that you’d want to keep in the middle of a book

Mmm… I think it’s fairly enough at 2:30 AM, I shall call it a day