The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

It's just a tiny skin SAMPLE.
You saw me do it to myself.
The Big Bang Theory Season 10, Episode 8

which would make for
a better SAMPLE.
The Big Bang Theory Season 12, Episode 14

It's a bigger SAMPLE size.
The Big Bang Theory Season 12, Episode 17

It's a SAMPLE cup.
The Big Bang Theory Season 12, Episode 12

20% faster than any other SAMPLE
in Amy's lab.
The Big Bang Theory Season 10, Episode 8