2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96418We study the effect of dipolar interactions on a magnetic striped monolayer with a microscopic unit cell of square symmetry, and of size $(N_x\times N_y)$ spins. Even if the aspect ratio $r=N_x/N_y$ is very large, an in-plane shape anisotropy is always negligible, except if $N_y$ is fairly small $(N_y<40)$. In-plane domains are not possible, except for values of the dipolar coupling larger than the domain wall energy.Latex file, 12 pages, 3 figures. Article accepted for publication in European Physical Journal (EPJ) BCondensed Mattertext