Roshan-sized

Very Large, Huge, Humongous

She wouldn’t believe me, until I pulled out my Roshan-sized rifle.

Hug-Sized

also "hugsized" and "hug sized"

when someone or something is the perfect size to be hugged. To be just the right size.
Not too large, not too small, not too thin, not too wide, hug size!

this sourdough loaf is perfectly hug-sized!

Tucker size

A very small dip or chew

I’m taking a tucker size because I dont want to get busted

Liv sized

When your mouth is small so you want your dick to be small.

"How do you like your dick?"
"Liv sized!"

Buster Size

When your idea of a good size tattoo is 2 inches and you are lovingly convinced to grow that tattoo into a 10-12 inch masterpiece. This may or may not be a good idea.

"That tattoo is awesome! But just so you know he's going to want to Buster size it. -Jenn

Trade Size

A trader for example in the stocks and futures market who likes to trade in huge quantity
for example Trading 100 YM (worth $16.4m time of writing) / ES Contracts (dow jones index & S&P 500 Futures)

or buying 10000s of Apple Shares on the spot.

And of course for the Forex traders 10 lots+

Example 1:
Experienced Trader: I like to wait for pullbacks to my specific price levels and i'll buy 100 YM Futures contracts minimum (of time writing worth $16.4m in cash)
Another Trader: That's alot of size Steve i couldn't handle that.
Experienced Trader: I like to trade size the markets reward those who Trade Size
Another Trader: Oh really steve?
Experienced Trader: Oh yes i like to trade astronomical size!

Example 2:
Steve Ruffley: The ability trade size is a rare, rare thing you know and I'm not even a big trader you know there's guys
out there they are much bigger than me and I trade size because all I make money that's a simple fact
of the matter it's a necessity for me I don't have the interest of patience straight a ten pounds a point it will not give
me what I want out of life so I trade big because the bigger you trade the more money you make
you know you deal with that in your own way.

cute size

Used to describe someone little or short

Boy:“You are short”. Me: no I’m cute size !