This time of year can be tricky because you can start out at 30 degrees in the morning and by mid afternoon it could be in the 70's. A lightweight, long sleeve tee is a great option for this time of year. You can layer it in the morning, remove your jacket by the afternoon and push your sleeves up by late afternoon.
The following suggestions are all for the Alluring Woman, but I've given you ideas for individual shapes. I've also started to explain why you would choose this particular silhouette so that you can apply it to other items.
This is the perfect top for the Hourglass. The faux wrap gives you a low enough cut to show a little cleavage without being too much. The ruching in the middle draws the shape back in to show off your small waist. The sleeves are slim cut but not too tight. As an hourglass the thing you want to focus on is highlighting your waist and the delicate curves of your womanly body. Let the fabrics skim your body but nip in at the waist (or you can belt your tops for the same effect).
These cute little shoulder cutouts give the Rectangle an illusion of soft curves. You may not realize right away by looking at this that the top is straight cut. But by showing the skin at the shoulders you achieve a sexy, bared look without plunging into the neckline.
The Oval is a tough shape to dress. You want to do what you can to minimize the attention being drawn to your middle and keep the look feminine and sexy. This top is full and gives you plenty of room to be comfortable, but the low cut still makes it sexy. One of the most important things to remember for this shape is to stop the length of your top at the narrowest part of your hips. If you go longer, it becomes a tent and if you go shorter you will draw attention to the widest part of your body.
The Inverted Triangle has a real challenge not to look too sexy. With a larger bust and narrow hips, a low cut top can be very challenging to wear. A great alternative to show the shoulders. This allows you coverage for your cleavage but remains ultra sexy. By choosing something that has natural fullness in the top and nips in around the hips, you will show off your assets without adding volume where you don't need it. Ask any man and he will tell you that shoulders are hot!
When dressing a Triangle you want to keep the emphasis on her small rib cage and shoulders. A wide neckline on this top shows her sexy collar bone, her chest, it nips in around the rib cage but allows for room for her hips. The ruching on this top helps to draw the top in where it needs to and doesn't look overstretched around her hips.