8.5x11 sizes and Smaller:
The best paper to print your stationery on is bright white white card stock. I use two different weights: 32lb and 60lb when printing items on a standard 8.5x11.
32 Lb Paper (My go to brand -> https://amzn.to/2kiq79O)
I use this lighter weight for the majority of my printed decor. This is great for signs, straw flags, bottle labels etc. For items that are going to be wrapped around something (like straw flags or bottle labels) you don't really want any thicker of paper of it's actually a lot tougher to get it to stay and look nice, so keep in mind thicker isn't always better!
60 Lb Paper (My go to brand -> https://amzn.to/2jZyIxT)
I use this slightly thicker paper for items that either need to stand on their own or just need to be a bit more durable IE the invitation, favor tags, tent cards, cupcake toppers, banners etc. This paper provides just enough thickness while still being able to easily fold or hang if needed.
Each type of paper is going to print color differently, I know, crazy! With that being said, if you plan on printing large quantities I recommend first printing just one to make sure you are happy with the result before proceeding with the rest!
*If you prefer a more premium paper or a paper with a unique texture, generally most office stores will allow you to bring in your own paper for them to print on (the average thickness they can go up to is around 200 lb). This is a great option if you find a thicker or unique paper you love. Keep in mind your standard home printer may not be able to handle a very thick paper, typically they can’t handle more than a standard card stock thickness wise (Every printer is different so please refer to your printer manual).
You can find your own paper at Amazon, at a local craft store or specialty paper store. Here are my go to papers - they're the same brand just two thicknesses. The bright white quality results in vibrant colors once printed! 32lb: https://amzn.to/2kiq79O . 60lb: https://amzn.to/2jZyIxT
Large Posters:
Color Designs
I recommend printing larger posters (16x20, 18x24 or 24x36) at your local office store on their 55lb poster paper. This provides a great quality thickness and finish. You also have the option to have your poster mounted to a foam board for added weight or to stand well on its own on an easel or on a table. If you don't mind a slight glossy finish you can also have your design printed as a photo at your local drug store (Ie Walgreens, CVS, etc). Colored designs actually look really great with a gloss finish if you don't mind the shine and you can often find drug stores having photo sales!
Black and White Designs
If your design has no color and is only black and white you have two options. 1. You can follow the instructions above in the color section for a nice thick quality print OR 2. You can print on an economical thinner 20lb bond paper. If you print on 20lb bond paper it's a really thin paper so be warned, but, it's also super economical - only about $5 for a huge 24x36. Chat with your local office store for specifics on how to give them the file to print. Generally I email the file to their email address.