I put my needles thru a piece of paper and mark the type, size and how long used on the paper. I put them in a plastic box with a snap on lid. I don'thave to change needles as frequently as with each project if it has been small. if you use post-it notes you can stick the note on your machine to put the needle back thru the paper when you need to change needles. I hope you can understand this explaination.