I ordered some ateco decorating tips and have ordered all different size couplers and can't seem to find any that work with them. The tips fit over a standard sized coupler but I can't fasten it on with the part that screws on. A medium is way to big and the tip won't go on it. Do any of you know what size or brand I may need to look for that might be a slightly larger version of a standard?

Also, where is the best deal for business cards? I've designed my own but my computer prints a little blurry. I'm looking for  better printing quality and overall price...

I use Ateco couplers with my standard Wilton and PME tips.  I ordered them from Karen's Cookies.  HTH

It's the ateco tips that I need couplers for. I have a couple of ateco couplers and they won't even fit the ateco tips

Sorry but I am not sure if I can help you or not.  I use Wilton couplers and never had any problems with Ateco working on them.  There are only 2 sizes of couplers and the regular tips should fit.

I always use vistaprint.com and they do a great job.  You can design you own cards and they are reasonable if you get the printing on one side only.  Give them a try.