I have noticed that some people make the sign of the cross twice and/or end it by kissing their fingers or thumb. I’ve even seen people who cross from right to left at the part of “Holy Ghost”. Well I’ve always been a little curious as to why so I did a little digging, and this is what I came up with. Oh, please feel free to add comments or corrections if necessary.
I actually didn’t find much about making the sign of the cross twice, except on Orthodox websites. When venerating icons (statues/pictures) the sign of the cross is made twice, then kiss the icon (never on the face) and make the sign again. I also found something that states that the sign is made twice while entering the Church to give reverence.
Ending the sign of the cross by kissing your thumb is primarily an Italian or Hispanic practice. At the end of the sign of the cross a kiss is given to the thumb nail, as if a kiss was given to the nails on the cross. Nothing I found mentioned fingers.
No information was found on crossing from right to left so if anyone knows about it please share it for all to see.
None of the information I found came from any official documents, but from surfing the web and reading other peoples comments, so please don’t hesitate to correct or add any useful information.