Basically, you have two options... Buying all new bottles, or some nipples are "standard" size, but have a little wider base. Medela makes some that are considered standard sized, but have a little wider base to them. However, I'm really assuming you are meaning wide ones like the for the disposable playtex style bottles, right? In that case, yes, you will need new bottles, the nipples and rings won't fit on standard sized bottles.
--Mimi
Mom to Lala (2004), Bonus Mom to Big Sis 1 (1991) and Big Sis 2 (1992)
Grammy to Big Kindy Kid (2011), Big Pre-K Kid (2012),
Grandbaby Appendage (2014), and New Baby Grandboy (summer 2017)