easyjet 免费行李尺寸到底算哪个额？

本来在easyjet上订尼斯到罗马的机票发现还挺便宜的，结果到行李那块就晕了。我到底应不应该订那个行李票啊，太贵了！每个乘客只能携带一个行李，一个cabin bag（随机行李）对于standard乘客的要求尺寸是50*40*20，然后他又说了一句，Cabin bags: All faresYou can still bring a bag up to 56 x 45 x 25cm, but it’s likely that on some of our busy flights your bag may have to go in the hold.easyJet Plus cardholders or customers who purchase an easyJet Plus Up Front/Extra Legroom seat are allowed to bring ONE piece of cabin baggage no bigger than 56 x 45 x 25cm (including handles and wheels). Overhead locker space is limited so you can use the easyJet Plus Speedy Boarding queue to board first and secure your space.仍然可以带56*45*25这个尺寸的，但是可能会被托运不能随机携带（但是又没有说是不是免费托运啊），而付费灵活型乘客要求是这样的：
Cabin bags: FLEXI faresFLEXI fare customers are allowed to bring ONE piece of cabin baggage no bigger than 56 x 45 x 25cm (including handles and wheels)。而且我在官网上还看到两种类型的乘客cabin bag尺寸要求有写一个是min 一个是max，也就是一个是50那个尺寸，一个是56的尺寸。。。。。。。。。所以我们普通乘客的行李尺寸到底可以多大呢？？