Hi Master Cecil Lee, Currently my home is custom made an altar. I have measure my own using the normal ruler. From the floor to the table is 136cm to put my Kuan Yin God sculpture. But according to my old altar which I bought it from shop is only 126cm and it does matches with your measurement. My question is 136cm is that an inauspicious height? I am actually asking the ID to change for me cause I feel is high. Is about 10cm different and she said is a feng shui measurement. Can you teach me how to measure using feng shui measurement? According to you when top and bottom of the ruler reach red is good?? Besides, for the ancestor I have measure is 133.8 using the normal ruler. Mind to ask what is the best measurement for the height from the floor? Master Cecil Lee, the whole altar I measure using normal ruler tape. I just found out that even I measure from the floor but the custom made altar there is a few inches high before the 'dei chi gong' (God of deity??) table. So the measurement 136cm is still inauspicious from the floor? Should I remeasure from the 'dei chi gong' (God of deity) table? Usually the table is consider floor to us as standard unit purchase from shop does not have extra bottom.