Instruction: Answer the given question using the supporting document.

Input:
Question: IS thebag canvas or plastic?  Also what size is the bag?
Document: This is a nice set for people who don't have a need to have a complete set of bags and tips. You can do many things with the two included tips. I particularly like this size tips for making eclairs and piping mashed potatoes on top of a shepherds pie or just by themselves on a cookie sheet for browning in the oven. You can of couse also use them for decorating a cake or cupcakes. The bag is a well made nice handy size too.
I have looked for the large plain 1/2inch size tip for ages with no success and was thrilled to find it on Amazon. It is PERFECT for making those amazing Hi-Hat cupcakes featured on Martha Stewart and in the CUPCAKES cookbook. The reusable frosting bag is also great. I made the cupcakes for a birthday party this week, and the results were fabulous! The frosting tip made it so fast and easy.
What a great bargain!! This bag was featured on America's Test Kitchen as the best pastry bag and they were right! The tips are perfect for me. I make my own devil dogs so the large size was exactly what I needed.
I bought these to have a quick decorating option for cupcakes. The bag is very heavy duty and cleans as easily as can be expected. To give a picture of the size of the icing tips, the opening is about 1cm across. Quality items.
So I thought I minus well spend the extra money and get a bag also and I super glad I did because now I don't need to borrow other peoples bag just to use the tips.
It was all but completely impossible for me to find an 806 tip sold by itself, be it in a store, or even online. This set was the smallest and most inexpensive I had found.Let me just say it's worth every penny! The tips are both the perfect size for frosting cupcakes and the piping bag that comes with the set is the nicest one I've seen. Love it!
I was looking for a pastry bag to make eclairs. This works wonders! The bag is awsome, perfect size. It's so easy to fill and then wash afterwards. It's nice and sturdy, does not leak. I have already used it several times. The tips are pefect as well. I am very happy I found this set. (I used to own a great pastry bag before but it came undone in the seam after a while. I am anxious to see if this one will hold up.)
It works well but you really have to squeeze with both hands to get the contents out. It does work better than using a plastic bag. Cleans easily.
The bag works, and the attachments are perfect for cupcakes and deviled eggs. I did not order the separate plastic attachments, but works fine with just the bag and metal tips.
With that strategy, only the plastic bag gets dirty and the pastry bag provides the strength. Now, if I only knew how to decorate like the pictures you gals have posted on this product! Amazing.
Answer: The bag is plastic coated canvas and is 12" long (good size)....  a nice sturdy bag.