Need help with ideas for a tat for my mum

So my mum died 2016 and I want to get a tattoo in honor of her. First I wanted sth on my wrist but now I think sth with a cross and roman digits on my chest could be cool. But I don't have a real picture in my head of how it should look, just these 2 motifs. And I'm not sure of the size. I wanted sth small but if I want to continue with tattooing my body, sth small could just disappear among other tattoos. https://ift.tt/2OlaeLT