The burgundy dress shows a high rounded floral translucent-looking neck area. A denser front beneath continues into a closer skirt line ending near the knees. Sleeves finish approximately at the elbows; their borders and the lower ending appear scalloped. The hands meet in front. Rose-gold-looking open ankle-strap shoes are visible but partly cropped at the front lower border. A complete footwear view remains an open question to resolve on the same real model.
Use the hands as a reference point for sleeve endings. Forearm area remains visible between the ends of the sleeves and the joined hands. This distribution is a separate question from the high patterned neck frame. Assess each on the actual candidate rather than inferring a particular level of coverage from dark colour. Similar pattern can have different effects in those areas.
Compare the matching rear and a view with relaxed arms afterwards. Try your bag and intended outer layer with that same dress. The visible pattern confirms neither fibres nor a maker. Its closer line cannot predict fit or behaviour in movement for a different wearer. Those questions need the actual fitting combination.