First, decide on the occasion. A baby boys' suit for a special event like a baptism or a first birthday party is likely to be different than a suit for everyday wear.
Next, take into account your child's size and shape. Most baby boys wear size 6-12 months, but some may be a bit bigger or smaller. Try on several suits and see which one fits best.
Finally, consider the fabric and style. A suit made of soft, comfortable fabric is ideal. Look for suits with a stylish, modern look.