How I can use larger logo then 35px in height?

You must esti main stylesheet /catalog/view/theme/pinshop/stylesheet/stylesheet.css
For enlarge logo part from 50px to for example 70px edit following:
Edit "height:" line 99:

.navbar-inner {
        border: none;
        background: #FFF;
        height: 70px; } 

.menubar {
        top: 70px;
        position: relative; }

#pinboard {
        margin:50px -5px 10px 10px;
        width:100%; }

#headerunder {
        position: absolute;
        top: 0;
        right: 0;
        height: 70px;
        display: block;
        min-width: 25%;
        margin-right:-140px;
        z-index:9;
        }

.topcart {
        height: 70px;
        display: block;
        width: 240px;
        position:relative;
        z-index:10;
        }