Has she used a ramp before?  There are some pups who will never use a ramp because of something called the visual cliff.  My TriPug Maggie was one of those although I didn't know what it was at the time.  She wouldn't go up stairs with open backs, wouldn't walk on a deck if she could see through seams or cracks, and as I found out after her amp she would absolutely not use a ramp!  I built three over the years and she would never use them.  They did come in handy later when little sis Tani got older and couldn't do the couple of stairs up to our deck.

As an aside- I recently found out my quad Pug Obie won't go up those open back or floating stairs.  I had both dogs with me dropping off some keys and had to go to a second floor office.  I ended up carrying my quad pug up and down the stairs while my Tripawd hopped happily up and down on her own

Anyway- before you invest in a ramp make sure she will use one.  I have stairs or stools to my bed and other furniture that the dogs are allowed on.  I build them myself for the most part but there are several options to purchase.

Karen and the Spirit Pug Girls