For generic r = (r1,. .. , rn) ∈ R n + the space M(r) of n-gons in R 3 with edges of lengths r is a smooth, symplectic manifold. We investigate its Gromov width and prove that the expression 2π min{2rj , (i =j ri) − rj | j = 1,. .. , n} is the Gromov width of all (smooth) 5-gon spaces and of 6-gon spaces, under some condition on r ∈ R 6 +. The same formula constitutes a lower bound for all (smooth) spaces of 6-gons. Moreover, we prove that the Gromov width of M(r) is given by the above expression when M(r) is symplectomorphic to CP n−3 , for any n ≥ 4.