User blog comment:Blackendedsoul/Devil Fruit Limits and Physical Ability/@comment-4642018-20120125164915/@comment-4642018-20120125165103

so yes soul, you are right, Luffy seems he can stretch more than the first chapter... but just remember when he ate the fruit, he did not know how to use it and had difficulties in stretching, the limit depends on the user strength with the fruit