I've ordered a few baking things on Amazon. I wish I'd thought to specifically asked for them to be delivered together.
Yesterday I had a big box with three items. Today, same size box and it contained two packs of icing bags surrounded by those bubble pillow things. They would easily fit in an A4 envelope.
Yes, it says disposable, but they're super strong, just as strong as the non disposable ones and I reuse them a lot and can use several at once. The last packs lasted 5 years!