Please read the Guidelines .

Any text in clipart should be converted to paths (Ctrl+Shift+C in Inkscape). The image should be cropped very tightly. It seems this image has exactly A4 size; if it is made for easy printing and *should* stay this way, please say so in the description.

Also, if I were you, (it is my personal opinion and not any official guideline) I wouldn't upload it as a "clipart", but as an "example". In "Examples" section we have images that show how cliparts can be used: in cookbooks, coloring books etc. I think that wedding invitation would perfectly fit there; on the other hand, you could upload the floral motif from this invitation as a separate clipart.