hi
i have created a sub template called default (templates/mytemplate/html/com_k2/default/)
in the parent category, under "item view options" i set "font resizer" to "show"
also, in the K2 main options, i have disabling the default k2 css.

the text resizer does not work.

however, if i enable the default k2 css the resizer works.

the website is www.dpemed.com
example item page: www.dpemed.com/products/dynamic-stair-trainer-dst.html

Any help will be greatly appreciated.

Since you don't use the k2.css, you will have to embed this

/* --- CSS added with Javascript --- */
.smallerFontSize {font-size:100%;line-height:inherit;}
.largerFontSize {font-size:150%;line-height:140%;}

to your template css. It is the one that provides the sizes to the classes changing when the font-resize is clicked.