Short stories aren't measured in pages -- they're measured by how many words they have. A short story has 5,000 words or less, traditionally. Divide that by around 250 words per page and you have around 20 pages or so.
Kaleidoscope - short story collection - has 249 pages.
Only Human - short story - has 362 pages.
Pilgrims - short story collection - has 224 pages.
Getting to Know You - short story collection - has 297 pages.
I am writing a short story and so far I have 2250 words witch is like nine pages.
The mass market paperback has 311 pages.
Rick's Story has 246 pages.
The Short-Timers has 192 pages.
The Big Short has 266 pages.
The Story of B has 325 pages.
Scotland's Story has 428 pages.
Lisey's Story has 528 pages.