Determining the length of the shoelaces for your children's shoes can be done in the same manner that you'd figure out what shoelace size you need. This is not as easy at it may sound though because due to the different styles of kid's shoes that are available, the necessary length will vary. As children learn to tie their own shoes, it may also be beneficial to get slightly wider shoelaces that are easier to handle and grip for a child's hands.
Look at the packaging of the children's shoes to see if it offers any indicators about shoe lace size or length. If there is anything on the box about shoe laces, it will most likely say something like, "red 8 eyelet." This would describe the factory shoelace color and the total number of shoelace eyelet pairs that are on each shoe.
Note the number of eyelets on each shoe, which serve as a contributing factor to the length of the shoelace that's required. Since children's shoes are small, the number of eyelets is going to be less than an adult shoe. If there are three or four pairs of eyelets, the shoelaces should be approximately 27 inches long. If the pairs of eyelets is increased to 5 or 6, the required length increases to 30 inches.
Consider the level of tightness that will be required for the shoes your child is wearing. If it's a dress shoe, the length can be shorter as they do not need to be as tight as an athletic shoe. If your child is wearing sneakers, equip it with a slightly lengthier shoe lace so that your child can easily tighten the laces.