Thanks everyone !
Steve and Carl, I bought this plant in very bad condition about one year and a half ago. It tooks long time before it recovers but it blooms for the first time at home now.
My plant is about 30 cm/12 inches and the leaves are about 20 cm/8 inches long. Please find a photo attached.
I can not really say at what age/size can bloom this specie as I've bought my plant adult.
Thanks Steve for compliments but I have to say that I have admiration for people who grow Vanda under non tropical climate because in Thailand it is much more easy as the needed amount of light and humidity is natural over here.