Dinette Cushion measurement - request

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Hello All
We recently purchased a 2017 Escape 19 with a front dinette. So we are the second owners. We wanted to change the fabric on the Standard Dinette (two separate benches). But something just looks odd with the cushion lengths.
Each bench has two cushions Bottom and Back.


Bottom cushion measures - 4 x 44.5 x 24.5
Back cushion measures - 4 x 39.5 x 15 1/4

With these measurements when the cushion are in the sitting position everything fits nicely but as soon as you want to use it in the sleeping position the two back cushions look too short to me. 4 inches too short.

Could anyone measure their own cushions and provide or compare measurements?
Is this right? Or are the back cushions I have too short?

Thank You