Appendix
SpotXchange Categories
Index of banners for the parameter "iab_imu"
Banner sizes can be specified by the dimensions or the banner id.

Dimensions
(Width x Height)
Banner ID
300x250 medium_rectangle
250x250 square_pop_up
240x400 vertical_rectangle
336x280 large_rectangle
180x150 Rectangle
468x60 full_banner
234x60 half_banner
88x31 micro_bar
120x90 button_1
120x60 button_2
120x240 vertical_banner
125x125 square_button
728x90 leaderboard
160x600 wide_skyscraper
120x600 skyscraper
300x600 half_page_ad