Choosing the right PLY?

[FONT=Comic Sans MS][SIZE=5][COLOR=red]You know I am from the old school of knitting. You pick your yarn out by ply. Now when I try to shop for yarn to follow my patterns, the ply is not given. I need 3 ply baby yarn, how do I do this?[/COLOR][/SIZE][/FONT]
[FONT=Comic Sans MS][SIZE=5][COLOR=#ff0000]thanks so much[/COLOR][/SIZE][/FONT]
[FONT=Comic Sans MS][SIZE=5][COLOR=#ff0000]DaisyMae:knitting: [/COLOR][/SIZE][/FONT]
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Here is a chart that should help you.LINK

You will need to look at the UK designation for the ply and then see what some other names for it are, and how many stitches per inch the yarn works up to and use that to help you shop.