I had seen plenty of beautiful crocheted vase covers in the net and had wanted to make one. But I don't remember seeing instructions anywhere, so I had to figure it out myself. Not a big deal, of course. It is quite easy. But since those of you who are new to crochet could use some guidance I have shown you how I did mine.
Take a bottle or any container that you wish to use. (If your vase has curves, then this instruction is not for you).
Using your yarn and hook make any number of chains to correspond to the circumference of the bottom of the container that want to cover.
You can check the length by placing it tightly around the bottom of the container as shown in the picture. (top or bottom dosen't matter if your container is a straight one. Mine widens slightly at the top).
Once you have reached the required length you can stop making any more chains and join the first and the last chains together with a slip stitch.
Make 2 ch to serve as a starting stitch and start working 1 sc (single crochet) or make 3 ch to serve as a starting stich and work 1 dc (double crochet) into each chain and continue working around. Join with a slip stitch. Continue working this way until you have reached the desired height.
Sometimes, if your container has a widened top like mine, then you might have to expand your work towards the top. For this at the beginning of a round where your container starts to expand you can work 2 sc/dc into one stitch. If that is not enough then somewhere around the middle of the round you can work another 2 sc/dc into one stitch. That would do. Always check now and then to see if your work is fitting the container. Otherwise make adjustments to make it fit.
Hope that was useful. Have a nice day.