'Same plot height adjust, grid.arrange

I'm working trying to arrange multiple plots using grid.arrange. However I have problems with the heights, I need the same heights.

fig3<-grid.arrange(p.antro.sor.dif.trsmbf_1, 
         p.antro.sor.dif.ma_11, 
         p.antro.sor.dif.mgs_8,
         p.antro.sor.dif.trscf_3, 
         p.antro.sor.dif.mfw_9, 
         p.antro.sor.dif.dxs_10, 
         p.antro.sor.dif.tgss_6, 
         p.antro.sor.dif.fgs_7,
         p.antro.sor.dif.trsgss_5, 
         p.antro.sor.dif.trsdbf_2, 
         p.antro.sor.dif.tbmf_4, ncol=3, nrow=4)

enter image description here I can't keep the same heights for all. I tried to use ::heights:: but I don't know exactly how its works. Any ideas?.

Thank you all



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