im not too familar with thumbs MGP sites but in addition to hosted thumbs TGP site for LONGBUCKS programm i currently doing MGP size based at same trading script. read more here if you interested:
https://gfy.com/fucking-around-and-business-discussion/700595-longbucks-30-signup-option-revshare-hosted-trade-thumb-tgp-read.html
so far i thinking about crop 135*125 thumbs (since it work well for me at movies sites in past) but as i see people using big thumbs (never have luck with big thumbs sizes by myself from sales/ratios point). so. tell me what dimensions are actual right now.
thanks in advance.