This design is called "Pink Flower Border (XML)" and it's available under Creative Commons Attribution 3.0 Unported License.
The design is free and works with "new" blogger - ie: it's an XML template. Please ensure that you backup your widget data, as installing a new template will wipe/erase your current widget content.
- Download the XML template: here (zip)
- View more Blogger templates: here
- Need help installing this? Click here