All ad units may not be available in all properties and targets.
Check specifically with your Account Executive, or contact us.

Name	Size	Specs	Sample
Skyscraper (SKY)	120 x 600	SKY Specs	SKY Sample
Rectangle (REC)	180 x 150	REC Specs	REC Sample
Half Banner (SPON)	234 x 60	SPON Specs	SPON Sample
Banner (SPON)	468 x 60	SPON Specs	SPON Sample
Rectangle (LREC)	300 x 250	LREC Specs	LREC Sample
North (N)	728 x 90	N Specs	N Sample