Multicolored Plaid Sport Coat

Front button style: one button

Button stance: very low (I like a low button stance, but this is too low.  On the upside, if worn with today's low-rise pants, the button matches up perfectly with the rise, so that no shirt or tie is revealed beneath the button.)

Jacket length: long

Front darts: none (almost no waist suppression)

Lapel width: classic
Lapel style: notch
Notch height: low

Colors: hot pink, teal, black, gray, tan, and beige.
Pattern: plaid (does anyone have a more precise name for this plaid pattern?)

Jetted or patch pockets: jetted
Straight or hacking (angled): straight
Flapped or flapless: flapless

Sleeve button style: two button
Spacing: apart

Vent style: ventless

Shoulder: moderately padded

Age verdict based on all the above evidence: circa 1985-1989

Darren Criss at FX 2017 All-Star Upfront

Darren Criss in a one button suit at the FX Network 2017 All-Star Upfront.

Ludacris at 'The Fate of the Furious' Atlanta Screening

Check out his maroon one button suit, with thin notch lapels and short pocket flaps.

1966 Sears Christmas Book

Check out #2, a one button sport coat with side vents and cloverleaf lapels, "the look that's taking the lead in men's sportswear".

Armie Hammer at SXSW

Armie Hammer wore this slim notch-lapel, one-button suit with three patch pockets at South by Southwest. 

David Oyelowo at 2017 Spirit Awards

David Oyelowo wore this one-button, shawl-lapel suit to the 2017 Spirit Awards.  Make no mistake: this is not a tuxedo; this is a business suit.  The one-button, shawl-lapel suit was a 1960's trend that unfortunately never really caught on.  It's the most simply elegant of all suit styles, especially with a low button stance as worn here. 

Dan Stevens at the 'Beauty and the Beast' London Premiere

Check out the button-one, single-breasted, peak-lapel, navy suit that Dan Stevens wore to the 'Beauty and the Beast' London Premiere.  I agree with Tom + Lorenzo that his look is bland, but it would be even more bland if the suit was a button-two.