Hmmmm,
From what I hear, the average guy exaggerates their height by 2inches because they take into account shoes/boots as part of their height. Females are worse because they may even include their high heals as their natural height.
There is only so much you can exaggerate if you plan on meeting these chicks, and not just have virtual friends to chat with.....
When it comes to these dating sites, what chicks are using to discriminate are.... 1. Height, 2. Facial aesthetics, 3. Social value. This last one is very important, because if the chick is somewhat interested in you, she will browse your pictures for clues on how you live your life..... In other words, all the writing in the world and bragging about yourself is not going to do much in comparison to a couple of pictures of you being shown as having a fun and great social life.
Just because a guy is 190 cm tall, does not automatically qualify him as a romantic interest.... so in your case, just put yourself out there and remember what I mentioned above.