difference between euro and standard

hi im looking to buy a new drum set but i wanted to know what was the difference between euro shell pack and standard shell pack.. does anybody know what they mean?

Often "Euro" is used along with "fusion" to denote smaller drums. Or shorter toms. What DW calls their FAST sizes. So I Euro or fusion kit will often have a 20" kick (although sometimes it's still a 22), 10, 12 & 14" toms. While a "standard" kit will often have a 22" kick, 12, 13 & 16" toms. No hard and fast rules, but the terminology has become pretty popular.