User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-76.69.6.109-20110908150820

Just to let you guys know, a 3DS cart can hold up to four times as much as a UMD according to the manufacturer of the carts. Launch games seemed to be limited to about hte same size as a UMD, so 3G probably won't be quite that big, but possibly bigger than a PSP game anyway.