I am doing a barbie dress cake for my neice and I want to do ruffles using buttercream and the petal tip (103)........does the big end point down or is it the other way around?

Here is an example of the ruffles:
http://cakecentral.com/gallery/1884692

Please help me the cake is for tomorrow!!!!!!
Thank you.

I am by no means an expert on this, but I would say "yes", you need to point the wider end of the tip down. It looks just like an upside down petal. HTH

The big side of the petal tip goes against the cake. The smaller side of the tip will be away from the cake and what will form the ruffle part you see at the end.

Watch this video, at around 2:11

Making ruffles with the petal tip the wide end always touches the cake

Imaginethatnj -Great tutorials - thanks for posting.

You guys are awesome!!!!

Thank you so much for your help. I'm gonna go try it again.
I hope it works this time

I tried doing the ruffles but it just didn't look right! I don't know what I'm doing wrong. I pointed the big side down but it looked no where near as good as the ruffles on the photo

I gave up and just piped on it with a star tip. I really hope to make ruffles one day so any other advice would be much appreciated. Like how to hold the bag? eg: hold the bag on the side or hold it perpindicular to the cake?