Pale patterned sleeves have two distinct visible areas here. A translucent-looking rounded section sits above a longer forearm area carrying denser pale ornament. The bodice contains substantial vertical decoration and a higher translucent zone above it. Below the waist, the light grey-looking skirt widens. The photograph ends before a complete hem view, so it cannot settle floor length or suitable heel height. Fibre and internal sleeve construction are also unconfirmed. These limits leave a useful comparison of shape without turning an image into a specification.
First decide which arm section appeals to you. Do you want roundness only at the shoulder, or the pattern continuing farther down? Try jewellery initially without an additional necklace so you can judge the already detailed centre. Add your preferred option afterwards and view the complete bodice while seated. Test the actual sleeves by reaching forwards and lowering your arms again. If one section shifts or needs a different position, identify that area instead of rejecting the whole dress vaguely. You can retain the sleeve idea without choosing every other detail in the reference.