Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Various sizes are offered, but there is no sizing chart. Could you please provide the guidelines for sizing?
Document: I purchased this vest for my 7-week-old daughter. I was worried it would be too loose on her (she weighs about 8-9 lbs), but the jacket tightens up well. We tested it and there is no way her head could slip through and it holds her head and neck stable. Overall I am very happy about this purchase, especially for the price.
The advertised price and the price after delivery are far different. I could have bought the same lifejacket where I live for the sameprice or less with a warranty. Your warranty means nothing when one has to jump through hoops to return an item.I wont order from Amazon again and would not recommend others to either unless they live in the US.
Great quality life jacket for the price. Doesn't fit a newborn to well, and this is the smallest size we could find, although this is probably due more to a newborns body not being ideal for something overlarge like a life jacket that's designed to protect. I think they'd have to create a whole new design to have something fit a newborn appropriately.
Safety:  The vest is designed to keep baby's head above water at all times. If it's on correctly, it does that perfectly. I really like that it has a handle on the back for an adult to hang on to the baby, or -if ever needed- to pull baby out of the water. The straps adjust easily to fit different sizes.
well made and it fit my 20 month old son perfectly with room to grow. bought it as a safety precaution for kayaking.
this life jacket i'm sure will save my son's life, but he'll never wear it. he's 1 and 20 lbs, and we need something to keep him safe in at the pool and beach. this is way too small for him and it digs into his chin and face. he screams when we put it on him and he can hardly walk in it. there is no way this is an option for us to use at the pool and beach. i'm still looking for a life jacket for him.
great jacket for the price. I couldnt believe that the blue one was cheaper than the red one. So if color is not a preference compare the prices.
a must have for the outdoor type family, stearns is the first name in boat saftey and accept no duplicate in your childs well being
Yes, this thing is bulky...but I wasn't looking for a training vest. I was looking for a real, fall in the water and have my daughter's life be saved life vest. It does the job! She is 17 months old and 22 lbs. She moves around in it just fine. She is VERY temperamental and typically doesn't like to do or wear things that well...she doesn't want to wear.
Works as advertised and he wasn't trying to constantly rip it off so I'm guessing he thought it was comfortable.
Answer: no