  We explore the construction of Legendrian spheres in contact manifolds of any
dimension. Two constructions involving open books work in any contact manifold,
while one introduced by Ekholm works only in $\mathbb{R}^{2n+1}$. We show that
these three constructions are isotopic (whenever defined). We also recover and
generalise a result of Courte and Ekholm, that shows Ekholm's doubling
procedure produces the standard Legendrian unknot.
