Miniature Latte Art bottles are easy to hold - like magic markers - and permit you to do extremely detailed embellishments to basic patterns done with the large bottle. Use the large bottle to do a basic pattern with one syrup (e.g., chocolate), and use a mini-marker bottle to add lines and shading in a different flavor & color.
Small (2 oz.) bottle has a body that's 3" long and 1" in diameter. Larger (4 oz.) bottle has a body that's 4" long and 1.5" in diameter. Both have long, fine tipped ends for detailed swizzles.
These are for ADVANCED (competitive) barista art, and aren't needed for basic designs.