If you're confident that your milk texture is good (don't underestimate how important proper milk texturing is to pouring nice latte art) then just keep practicing. Latte art isn't easy and takes a lot of time, practice, and patience. From what I've read, watched, and experienced myself... if you are getting small patterns then you may be starting to pour your art too late (meaning you're filling up the cup with too much milk during the incorporating phase). Try not filling the cup up more than 1/4 to 1/2 of the way before starting to pour your design... play with the amount you add until you find the spot that you have enough room to pour your pattern.

Also be sure you're using the correct sized milk pitcher with the correct amount of milk for the size of cup you're pouring into... sometimes too small of a milk pitcher is used and you don't have enough milk to make a large design. I suggest to start with a basic pattern (monks head and heart), master that, before trying the more advanced patterns.

Solid milk texture first and foremost then practice practice practice... then practice some more. Have fun and good luck!

Looking good! I would second the above comment that the milk looks a little stiff... adding just a little less air might help as well.

As far as right sized pitcher... I was just referring to a pitcher that holds enough milk that can allow for the increase in volume when texturing. When you pour having a little bit left in your pitcher (vs having it completely empty). Just don't use a small pitcher for a large cup... makes things a bit harder.