cylinder 82 represents a dimensional standard for use in measuring compliance of children 39 s safety belts with current or proposed regulations in the configuration illustrated by seatbelt 80 the two seatbelt portions wrap around test cylinder 82 and are attached to a portion of the child seat with attachment devices 84 85 attachment devices 84 85 are located closer to each other than a diameter of cylinder 82 to provide a more snug fit for seatbelt 80 in this configuration seatbelt 80 provides a wide range of adjustability to provide a snug fit for test cylinder 82 or a child occupant of the child seat the dimensions of test cylinder 82 can be set in relation to measurements taken on a 6th month old child in the 5th percentile and 15 month old child in the 95th percentile seatbelt 80 should be able to accommodate children in this range with a snug fit and with less than an inch of space between seatbelt 80 and the test cylinder to ensure that a child secured by seatbelt 80 is safely secured with a custom fit in accordance with the recommended standard one or more seatbelt portions 86 88 may be formed according to the present invention to be adjustable with loose ends for the strap seat belt portions 86 88 may also include sleeves 91 93 that encircle the straps of seatbelt portions 86 88 to limit the dimension of loops formed by the straps in seatbelt portions 86 88 the provision of a seatbelt according to the present invention for any of seatbelt portions 86 88 permits a wide degree.