1 bunch = 90-100 grams (approx.)
Go for spring onions with firm, unblemished bulbs and bright green perky leaves. Avoid those that are slimy or wilting. The skin covering a spring onion' bulb can be either white or deep red fading to white at the roots - there's no significant difference in taste. Similarly, the bulb can be quite pronounced or more like a leek in shape, with no noticeable swelling; again, this has no impact on flavour.