But despite Starbucks' popularity, there can still be some confusion about their coffee sizes. Here's what you should know about Starbucks' sizes, from espresso shots to their 31-ounce trenta.

Another hack that I like for latte lovers is ordering a caffè misto (aka a 50/50 split of drip coffee and steamed milk) instead of a latte. It’s cheaper than an espresso-based latte, but still ...

The new cup size will be priced at 33 yuan ($4.51). The 259 ml cup size is much smaller than Starbucks' regular sized cups, which include the tall (355 ml), grande (473 ml) and venti (592 ml) options.