Classic American style is epitomized in the blazer. Ralph Lauren brought blazers to the forefront of fashion in the mid '80s, and it has since been a staple in every woman's wardrobe. Today we're showcasing the ultimate must-haves, the likes of which were born out of history's dynamic evolution of women's fashion, and its consistent relationship to the blazer.

The blazer is your versatile and tailored alternative to a sweater. Similar to a sweater or cardigan, it dances along the line between masculine and feminine, formal and casual, and preppy and alternative. A well constructed blazer can also slim you, cover you, and update a more casual outfit.

When it comes to patterns, the classic pinstripe is back and better than ever. It's the perfect time for the pinstripe trend to resurrect, since this spring is all about a sophisticated pattern over casual denim. Combined with a feminine and more tailored style, as seen in this blazer by Rachel Roy, the pinstripe serves as the ultimate updated piece when building your spring wardrobe. Versatile, fashionable, and easy to transition from day to night, it's perfect for the girl who embraces a professional look, even after office hours are over.

We're loving that this blazer contains the fiber elastane, which provides an enhanced level of comfort in a piece that's all too often made with thicker, more restricting fabrics. Also notice the clean lines in the slightly exaggerated shoulders, which help slim you while giving your modest look a very hip edge. A pinstripe blazer like this is effortlessly cool, feels fantastic, and is always working overtime—taking you from board room to dinner date in a snap!

STYLE TIP: Try pairing a plain white tee, baggy linen trousers, or a long romantic dress with your pinstripe blazer for a casual So-Cal look.

Coco Chanel was the first to introduce "la marinière" (sailor-stripes) into women's fashion; since then, designers have interpreted this classic style many different ways. The nautical style will bring a sense of levity that also maintains a bit of strength. This piece is an easy way to be playful in your wardrobe, while remaining as elegant as Ms. Chanel herself.

Sharply cut with eye-catching accents, this ultimate classic jacket by Tory Burch invokes an air of importance. We love the sharp lines and button detail of this Navy-inspired piece. It's fun, easy, and versatile, which makes it a must-have item. You'll have a little sass in your step while wearing this smart look- and maybe even command a salute here or there.

STYLE TIP: Because the sailor style is a classic, don't be hesitant to play with it. Go all out with your "captain" wardrobe: add a striped t-shirt under the blazer to finish the sailor style, or slip on some boat shoes to give yourself the ultimate naval look.

Spring means florals. Whether small buds or big blossoms, flower power is everywhere! Brighten up your wardrobe with a fresh, floral design blazer, and establish your roots as a bonafide style maven. Often shied away from, prints such as a floral pattern are a great way to modernize the basic blazer. But remember, this trend isn't fool-proof! Light backgrounds, smaller prints, and a fitted or shrunken shape are most flattering when implementing this look. Also, don't let the print overpower you, and try to keep the rest of your look streamlined.  

Tory Burch's above rendition of the floral blazer is perfection. The cut of the piece will aid in creating a chic ensemble. The sleeves are longer, but would also look adorable rolled up. This flirty blazer will suit any woman, which makes it an ideal piece to add to your closet this spring.

STYLE TIP: When it comes to florals and prints, keep it simple. Your jacket should be the one stand out piece. Don't allow other aspects of your outfit to distract from your on-trend blazer!

The boyfriend blazer is the easiest way to remain fabulously modest, while still remaining 100 percent on-trend. The "Borrowed from the Boys" look often surfaces in fashion, but no trend is as easy, and as universally flattering, as the classic boyfriend blazer. To achieve top-to-bottom chic in an instant, remember that proportion is key—don't go oversized everywhere. Pair skinny jeans with a truly oversized BF blazer, or wear a more fitted, shrunken BF blazer with baggy pants. Either combination you chose, the overall effect is promised to be casual perfection. This craze is here to stay and luckily for us, everyone can rock this look. Any shape, any size, the boyfriend blazer works for all body types. It also provides the perfect excuse to make that seemingly boring staple, the black blazer, an integral part of your everyday wardrobe.

Long and lean, this piece by See Steven Alan is our pick for best boyfriend blazer. Softly structured and well tailored, this blazer is bound to streamline your curves while adding a touch of sophistication to your overall look. With the hemline falling just below the hip, this piece is undoubtedly flattering in its cut, which hides any little imperfections from the shoulders to the hips.

STYLE TIP: Dress up your new BF blazer with a belt casually tied around your waist. Add some oxfords on your feet for a modern take on "Annie Hall." Or keep it more nonchalant with a loose t-shirt, skinny jeans and a brightly patterned scarf tossed around your neck. And, for the sophisticate eternal, take a page from Yves Saint Laurent and were your BF blazer with a sleek white button down, black trousers, and a matte red lip!

What started out as a man's work staple has evolved into a must-have item for any fashion conscious woman today. A blazer is the most practical item in a woman's wardrobe. Worn to work, lunch, or a play date; from tuxedo to boyfriend to cropped, there’s a blazer for every size, shape, and style. The best blazer is the one that you’ll toss on without even thinking.

Just Like Molly is a modest fashion blog for the modern woman. For more everyday style tips and fashion editorial, visit