Common banner dimensions (as of 10/2015)

300×250

728×90

300×600

160×600 

Less common banner dimensions (as of 10/2015)

336×280

320×100

320×50

300×60

320×480

480×320

468×60

234×60

120×600

180×430

768×90

120×240

300×1050

924×50

970×66

1024×66

1024×90

1280×100

970×90

970×250

250×250

200×200

180×150

125×125

Regional banner dimensions (as of 10/2015)

240×400

980×120

250×360

930×180

580×400

750×300

750×200

750×100