I think you're using postimage to upload images, which gives the thumbnail version of the pic.
Try : http://imgur.com/upload
no postimage has mny optns as well... i really dont knw y she is facing d prb while posting d pics from postimage...cz i post pics frm postimage only and u hav seen d my pics dt i post on pic gallery and d edits on creatn gallery dey r big enuf... i dont evn adjust d size while uploading...bt i gt gd huge pics to post dm on forum...actually der is a direct link optn on postimage aftr d pic is successfully uploaded if u clik and post dt link here it gves big size pics bt i dont knw wat is really wrong wid her pc or mobile dt direct link optn isnt visible so she cnt post dm...๐