Our child is fairly near the largest height or weight that the Standard Adjustabilisers can accommodate. Should we buy a set of Large or a set of Standard Adjustabilisers?
If you think the child is very likely to learn quickly then buy the Standard Adjustabilisers. If you think that is unlikely or have any doubts buy a set of the Large Adjustabilisers. If necessary they will then be able to cope with the riders increasing weight and be fixable to the larger diameter wheeled bicycles the child will need in the future.