scaling a Storyline interactive lock in in Rise

Hi. 

I imported Storyline interactive block into a Rise course. It works, as promised, but it is smaller (by at least 20% from the look of it) than an embedded MP4. (Please have a look at the attached to see what I mean. The upper graphic is an imported MP4; the lower is a Storyline interactive block.) 

How can I scale the Storyline block so that it is the same size and an imported MP4?