88*31 :

Code:

<a href="http://love-school-rpg.forumsrpg.com/" target="_blank"><span style="display: block; width:87px; height: 31px; margin: 10px; background: url(http://nsm08.casimages.com/img/2015/02/22//15022210502319114412996167.png) center; ceter; border-radius: 0.5em; border: 2px solid #FF80B7; padding: 0.3em;" ></span></a>

100*35 :

Code:

<a href="http://love-school-rpg.forumsrpg.com/" target="_blank"><span style="display: block; width:99px; height: 35px; margin: 10px; background: url(http://nsm08.casimages.com/img/2015/02/22//15022210502319114412996168.png) center; ceter; border-radius: 0.5em; border: 2px solid #FF80B7; padding: 0.3em;" ></span></a>

50*50 :

Code:

<a href="http://love-school-rpg.forumsrpg.com/" target="_blank"><span style="display: block; width:49px; height: 50px; margin: 10px; background: url(http://nsm08.casimages.com/img/2015/02/22//15022210502319114412996166.png) center; ceter; border-radius: 0.5em; border: 2px solid #FF80B7; padding: 0.3em;" ></span></a>