re: Which tip to pipe these ruffles?

They are these type of tips, but hers is very large. I have a set of smaller ones.

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQu10jn-PiF0_ldH4C_PllBvSFaSloWtqPQWZ-4M_4RX_OrE1q-kA

http://www.google.ca/imgres?imgurl=http://www.cater4you.co.uk/acatalog/piping-tip-Ruffle-87-l.jpg&imgrefurl=http://www.cater4you.co.uk/acatalog/wilton-ruffle-decorating-tips.html&h=500&w=500&tbnid=R2cgZapGBh3KWM:&zoom=1&docid=BINDDlAs93nh2M&hl=en&ei=dj90VY_8LIWFyQSVjID4BA&tbm=isch&ved=0CCcQMygMMAw

http://www.google.ca/imgres?imgurl=http://thecakegirls.com/media/catalog/product/cache/1/image/685×548/9df78eab33525d08d6e5fb8d27136e95/D/E/DEC-PIPTIP32_2.jpg&imgrefurl=http://thecakegirls.com/shop-cakegirls-cake-party-supplies/cake/cake-decorating-supplies/cake-decorating-piping-tips-piping-bags.html&h=548&w=685&tbnid=mhtUvtUUS9NRYM:&zoom=1&docid=kUPkG69EDXjWZM&hl=en&ei=dj90VY_8LIWFyQSVjID4BA&tbm=isch&ved=0CFgQMyg1MDU

Hope that helps give you some idea.